Best Polly Plastics in 2026

PUT A DAZZLING POLISH ON YOUR ROCKS with Polly Plastics rock tumbler grit and polish refill. Our one-of-a-kind rock polisher kit contains four different kinds of grits to provide initial shaping, smoothen the rock surface, pre-polish the rocks and finally polish the rocks for a professional-looking finish. Great for kids and adults alike.

PACKAGE INCLUDES - 1 lb. 60/90 coarse silicon carbide grit, 1 lb. 180/220 medium silicon carbide grit, ½ lb. 500 fine silicon carbide, ½ lb 1200 aluminum oxide polish, 1.5 lbs. non-abrasive ceramic filler cylinders and an easy-to-follow instructions manual. Polly Plastics also have 2-pack grit and polish refills available for each stage of the rock tumbling process, refills of our ceramic media and many more rock tumbling products. Check out our storefront.

GRIT SOLD BY WEIGHT NEEDED FOR EACH STEP – Steps 1 & 2 are 1 lb. each and steps 3 & 4 are ½ lb. each, but all are sold in the same size jars for packaging consistency. The different weights, along with different densities, will mean that jars of rock tumbling grit will not have equal amounts of fullness.

⭐ Non-Abrasive Ceramic Small Tumbling Media. 3/16” dia. X 3/8” long, angle cut cylinders.

⭐ Perfect for protecting stones or filling while rock tumbling. Cushions, quiets and improves tumbling action. Works with all tumbler types.

⭐ No need to keep separate for each stage – rinse and use the same batch through all the tumbling stages. Non-toxic, non-static and non-residue pellets are dryable and easy to reuse.

COMPLETE ROCK TUMBLING MEDIA KIT - 4-Step grit pack with 3 pounds of total weight. Our universal grit is designed for any rock tumbler. Get up to five tumble batches from a standard 3lb barrel.

PACKAGE CONTAINS - 1 lb. 60/90 Coarse Silicon Carbide Grit, 1 lb. 180/220 Medium Silicon Carbide Grit, ½ lb. 500 Fine Silicon Carbide, ½ lb. 1200 Aluminum Oxide Final Polish.

GRIT SOLD BY WEIGHT NEEDED FOR EACH STEP – Steps 1 & 2 are 1 lb. each and Steps 3 & 4 are ½ lb. each but all are sold in the same size jars for packaging consistency. The different weights, along with different densities, will mean that jars will not have equal amounts of fullness.

TWO LBS. Clear poly pellets. Use to fill tumbler to improve tumbling action.

PREMIUM High Impact Polypropylene. Stands up to rough tumbling action. Protect and cushion fragile stones and reduce tumbling noise.

Non-toxic, non-static and non-residue pellets are dryable and easy to reuse – float to the top for easy cleaning.

COMPLETE KIT - 4 Step grit pack and plastic filler for use in 15 lb. tumbler or five 3 lb. tumbles.

CONTAINS - 1 lb. 60/90 Coarse Silicon Carbide Grit, 1 lb. 180/220 Medium Silicon Carbide, Grit, ½ lb. 500 Fine Silicon Carbide, ½ lb. 1200 Aluminum Oxide Polish and 1 lb. of premium high-impact polypropylene plastic filler pellets. Protect and cushion fragile stones and reduce tumbling noise.

GRIT SOLD BY WEIGHT NEEDED FOR EACH STEP – Steps 1 & 2 are 1 lb. each and Steps 3 & 4 are ½ lb. each but all are sold in the same size jars for packaging consistency. The different weights, along with different densities, will mean that jars will not have equal amounts of fullness.

⭐ Non-Abrasive Large Tumbling Media. 3/8” dia. X 5/8” long, angle cut cylinders.

⭐ Perfect for protecting stones or filling while rock tumbling. Cushions, quiets and improves tumbling action. Works with all tumbler types.

⭐ No need to keep separate for each stage – rinse and use the same batch through all the tumbling stages. Non-toxic, non-static and non-residue pellets are dryable and easy to reuse.

⭐ Non-Abrasive, Ceramic Large Tumbling Media. 3/8” dia. X 5/8” long, angle cut cylinders.

⭐ Perfect for protecting stones or filling while rock tumbling. Cushions, quiets and improves tumbling action. Works with all tumbler types.

⭐ No need to keep separate for each stage – rinse and use the same batch through all the tumbling stages. Non-toxic, non-static and non-residue pellets are dryable and easy to reuse.

STAGE 4 OF 4 STEP ROCK TUMBLING MEDIA GRIT – Two 1.5 lb. jars of Stage 4 media grit for transforming rocks and gemstones into beautiful treasures. Contains a total of 3 lbs. Final Polish 1200 Fine Aluminum Grit.

COMPATIBLE WITH ALL TUMBLERS - Our universal grit is designed for any rock tumbler. Elenco, Lortone, National Geographic, Smithsonian, Thumler and more!

SUPERIOR PACKAGING - Packaged in durable, re-usable jars to prevent messy spills and to safely store unused product for later.

HEAT & CREATE – Melt our moldable plastic pellets with hot water (>150F) and mold to any shape you like, by using your hands or using tools.

STRONG & REUSABLE – Plastic pellets can be re- melted again and again so you can build, reshape and add to your work as often as needed. Paint it, drill it, cut it or attach it to something else.

IDEA & INSTRUCTION BOOKLET INCLUDED – Learn the many ways you can use our moldable plastic with our 12 page color booklet.

HEAT & CREATE – Melt our moldable plastic pellets with hot water (>150F) and mold to any shape you like, by using your hands or using tools.

STRONG & REUSABLE – Plastic pellets can be re- melted again and again so you can build, reshape and add to your work as often as needed. Paint it, drill it, cut it or attach it to something else.

LARGE SIZE FOR SUPER USERS – Our largest available quantity is a great value, packaged in a Heavy Duty reclosable zippered bag. 100% satisfaction guarantee on all our products.

PUT A DAZZLING POLISH ON YOUR ROCKS: Experience the exceptional quality of the Polly Plastics Rock Tumbler Starter Kit. With years of unmatched expertise in the industry, we bring you a kit that guarantees dazzling, professional-grade polished rocks. Unleash your creativity and achieve stunning results with our trusted brand.

COMPLETE PACKAGE FOR OPTIMAL RESULTS: Our rock tumbler starter kit is a testament to our commitment to providing the best. It includes the robust rock tumbler, four high-quality rock tumbler grits for superior performance, rough gemstones for tumbling, a gemstone jewelry kit, and spare belts. Every component is carefully curated to ensure outstanding results.

EASY TO GET STARTED: Begin your rock tumbling journey effortlessly with our user-friendly kit. We provide clear instructions that simplify the process. The rock tumbler features three convenient time settings, making it easy to achieve desired polishing results. Enjoy a seamless experience backed by years of Polly Plastics expertise.

Heat & Create: Shape and mold our high-quality plastic pellets by heating them with hot water (>150F). Perfect for cosplayers and hobbyists seeking precision and versatility.

Strong & Reusable: Our durable plastic pellets can be melted, molded, and reused multiple times. Build, reshape, and enhance your creations with ease. Ideal for long-lasting projects.

Idea & Instruction Booklet Included: Unleash your creativity with our comprehensive 12-page color booklet. Discover exciting techniques and step-by-step instructions for stunning results.

STAGE 2 OF 4 STEP ROCK TUMBLING MEDIA GRIT – Two 1 lb. jars of Stage 2 media grit for transforming rocks and gemstones into beautiful treasures. Contains a total of 2 lb. Medium 180/220 Silicon Carbide Grit.

COMPATIBLE WITH ALL TUMBLERS - Our universal grit is designed for any rock tumbler. Elenco, Lortone, National Geographic, Smithsonian, Thumler and more!

SUPERIOR PACKAGING - Packaged in durable, re-usable jars to prevent messy spills and to safely store unused product for later.

AUTHENTIC BIRTHSTONE SPECIMENS - This dig kit is truly special! Inside the beautifully designed dig brick are 12 precious and semi-precious gemstones. Your kids will love digging and discovering these dazzling specimens!

A SPECIAL GEMSTONE FOR EVERYONE - Every kid will find their own special birthstone in this gemstone dig kit! Garnet, diamond, ruby, pearl, sapphire, amethyst, emerald, opal, blue topaz, citrine, aquamarine, and peridot are all hidden within.

A COMPLETE SCIENCE KIT - This STEM kit is easy to use, thanks to the dig tool, brush, magnifying glass, and easy-to-follow instructions. A detailed learning guide teaches kids about each stone, too. A display bottle with keychain is also included.

HIGH QUALITY - This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 20 lbs. of rocks, gems, glass, and more

EASY TO USE FOUR-STAGE ROCK GRIT - The first rock tumbling grit stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks, and the fourth provides the final polish

COMPATIBLE WITH ALL TUMBLERS - This complete 4-step rock tumbler grit refill kit works with all rock tumblers. For best results, use with National Geographic Rock Tumblers and rock tumbling supplies

MASSIVE SCIENCE KIT FOR CURIOUS KIDS - More than 15 experiment activities including dueling water tornadoes, building an erupting volcano, growing a crystal, two geologic dig kits, and more

ENOUGH TO GO AROUND - This science lab allows kids to conduct multiple experiments and is great to share with family, friends, or classmates; you will enjoy the magic of discovery together

THE SECRET IS THE SCIENCE - A detailed learning guide teaches the science at work in the experiments, allowing your child to develop a deep, lasting appreciation for a variety of Earth sciences

ULTIMATE ROCK COLLECTION FOR KIDS - A perfect standalone collection or addition to any kid’s rock collection. Includes rough and polished samples of aventurine, rose quartz, stunning snowflake obsidian, desert rose, red jasper, blue quartz, pumice, and geode specimens as well. Makes an excellent STEM gift for girls and boys!

GENUINE FOSSILS - real fossils include prehistoric gastropods, ammonites, clams, brachiopods, and more. The included magnifying glass, full-color learning guide, and identification sheet will help you to sort and identify every rock, gemstone, mineral, and fossil in the collection.

REAL GEODES – Discover crystals treasures! Each kit contains one broken geode and two unbroken geode specimens for you to crack open yourself. Geology doesn’t get more exciting than breaking open rocks and finding crystal treasures.

DIG UP PREHISTORIC FOSSILS – These genuine fossils are millions of years old! Dig for dinosaurs, sharks, brachiopods, mosasaurs, ammonites, and more. This Mega Fossil Dig Kit is one of our top learning toys, providing hours of educational fun, and helping to inspire a lifelong love of learning!

EXPLORE PALEONTOLOGY – Excavate incredible, real fossils using the included tools of the trade: a chisel, brush, and magnifying glass. This kit makes an excellent STEM gift for boys and girls!

16-PAGE LEARNING GUIDE - This full color, detailed learning guide illustrates how fossils are formed and helps young scientists identify each specimen as it’s discovered. National Geographic educational toys make science and learning fun and are the perfect STEM activity for kids!

DISCOVER CRYSTAL TREASURES - Give your child the thrill of digging in a real gem mine as they excavate real crystal treasures. This educational engaging activity emphasizes fun, exploration, and discovery!

FIND 15 AMAZING GEMSTONES - Including pyrite, amethyst, tiger’s eye, fluorite, quartz, obsidian, aventurine, and more. Unlike other kids toys, the Mega Gemstone Dig Kit seamlessly blends educational value with fun!

A COMPLETE LEARNING ACTIVITY – This Mega Dig Kit includes everything you need to keep kids digging and learning for hours, including a dig brick packed with gemstones, a chisel, a brush, and a magnifying glass to inspect these amazing specimens!

CREATE YOUR OWN GEMSTONES - Make any stone sparkle and polish everyday rocks into dazzling gemstones! This rock tumbler kit makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design.

A TUMBLER THAT'S MADE TO LAST – Our high-quality tumblers are made with a durable motor that’s designed to last for years. The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. An excellent STEM activity for kids.

A COMPLETE HOBBY TUMBLING KIT - Everything you need to create polished gemstones: the tumbler, four polishing grits, sifter, nine types of real rough gemstones, plus a detailed full-color learning guide. Makes a great gift for girls and boys!

DISCOVER CRYSTAL TREASURE - Break open these rocks to reveal amazing crystals inside! Geology doesn’t get more exciting than breaking open rocks and finding crystal treasures. Ag great STEM activity that also makes an excellent gift for girls and boys!

COLORFUL VARIETY – Geodes can form with a wide variety of crystals inside. These geodes have been hand-selected to bring you the best variety available.

100% NATURAL GEODES – These real specimens may be as big as a tennis ball, or as small as a ping-pong ball. Kids will love the thrill of cracking them open to see the natural beauty inside. This STEM activity emphasizes fun and discovery!

YOUR KIDS WILL ENJOY HOURS OF FUN - This extra-large dig brick has 20 incredible gemstone and fossil specimens, allowing your kids to experience the thrill of discovery over and over again. It's sure to become one of their favorite educational activities

REAL SPECIMENS YOUR KIDS WILL TREASURE - This digging kit is so exciting because every specimen is genuine. Your children will uncover genuine gemstones and fossils that are millions of years old, making this a truly unforgettable educational toy

EVERYTHING YOUR CHILD NEEDS – This National Geographic science kit has all the tools your child needs to dig like the pros! In addition to the dig brick, there’s a chisel, brush, and magnifying glass. Hands-on learning has never been so fun

THE ULTIMATE ROCK COLLECTION KIT - This STEM science kit lets kids explore 2 pounds of magnificent geological specimens! These include agate, amethyst, blue quartz, rose quartz, tiger's eye, sodalite, hematite, various jasper varieties, and more!

POLISHED GEMS REVEAL HIDDEN BEAUTY - This collection of stones and crystals is dazzling! The polished luster of the rocks and crystals in this kit make it possible to see minute details, revealing the hidden beauty of each rock and crystal inside!

GREAT HOME DECOR AND CRAFT ACCESSORIES - These rocks and crystals have many uses! They make great aquarium rocks, and are also good for plant and candle arrangements. Use them as gemstone home decor or with a jewelry making kit! The possibilities are endless!

GEMSTONES OF NINE VARIETIES: Tiger’s Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Black Jasper. (3lb in total)

FOUR GRADES OF GRIT: Coarse, Medium, Fine, Polish. Transform your stones from rough rocks to dazzling gemstones!

JEWELRY FASTENINGS: 1 Necklace, 1 set of Earrings, 1 Keychain, 1 Ring. Create custom jewelry from your newly polished gemstones!

✅HIGH- QUALITY Rock, Gem & Mineral Collection ACTIVITY KIT includes over 200 pcs with full-color educational identification sheet and Rock book for hours of fun STEM-based learning!

✅FUN & EDUCATIONAL SCIENCE TOY--rock & mineral TREASURES are mixed with clean gravel to simulate a real ROCK HUNT! Match the rocks to the ID sheet and learn interesting gem facts!

✅BREAK OPEN GEODES and find beautiful crystals inside! Also included: SHARK teeth FOSSILS, stone ARROWHEADS, amethyst, quartz point, tiger eye, fool’s gold, rose quartz, and more!

PUT A DAZZLING POLISH ON YOUR ROCKS with Polly Plastics rock tumbler grit and polish refill. Our one-of-a-kind rock polisher kit contains four different kinds of grits to provide initial shaping, smoothen the rock surface, pre-polish the rocks and finally polish the rocks for a professional-looking finish. Great for kids and adults alike.

PACKAGE INCLUDES - 1 lb. 60/90 coarse silicon carbide grit, 1 lb. 180/220 medium silicon carbide grit, ½ lb. 500 fine silicon carbide, ½ lb 1200 aluminum oxide polish, 1.5 lbs. non-abrasive ceramic filler cylinders and an easy-to-follow instructions manual. Polly Plastics also have 2-pack grit and polish refills available for each stage of the rock tumbling process, refills of our ceramic media and many more rock tumbling products. Check out our storefront.

GRIT SOLD BY WEIGHT NEEDED FOR EACH STEP – Steps 1 & 2 are 1 lb. each and steps 3 & 4 are ½ lb. each, but all are sold in the same size jars for packaging consistency. The different weights, along with different densities, will mean that jars of rock tumbling grit will not have equal amounts of fullness.

⭐ Non-Abrasive Ceramic Small Tumbling Media. 3/16” dia. X 3/8” long, angle cut cylinders.

⭐ Perfect for protecting stones or filling while rock tumbling. Cushions, quiets and improves tumbling action. Works with all tumbler types.

⭐ No need to keep separate for each stage – rinse and use the same batch through all the tumbling stages. Non-toxic, non-static and non-residue pellets are dryable and easy to reuse.

ENORMOUS VARIETY - This rock tumbler refill kit has 5 pounds of unpolished rocks and gemstones consisting of a 1-pound gemstone mix, 1-pound agate mix, 1-pound Madagascar mix, 1-pound jasper mix, and 1-pound petrified wood mix

ROCK POLISHING GRIT – There are 20 total rock tumbler grit packets in the kit, enough for five complete tumbling cycles with any rock tumbler

JEWELRY SETTINGS – Once your rocks are polished, use the 5 included jewelry settings to create beautiful keepsakes or use the included storage pouch to keep your favorite specimens all in one place

COMPLETE ROCK TUMBLING MEDIA KIT - 4-Step grit pack with 3 pounds of total weight. Our universal grit is designed for any rock tumbler. Get up to five tumble batches from a standard 3lb barrel.

PACKAGE CONTAINS - 1 lb. 60/90 Coarse Silicon Carbide Grit, 1 lb. 180/220 Medium Silicon Carbide Grit, ½ lb. 500 Fine Silicon Carbide, ½ lb. 1200 Aluminum Oxide Final Polish.

GRIT SOLD BY WEIGHT NEEDED FOR EACH STEP – Steps 1 & 2 are 1 lb. each and Steps 3 & 4 are ½ lb. each but all are sold in the same size jars for packaging consistency. The different weights, along with different densities, will mean that jars will not have equal amounts of fullness.

REAL GEMSTONES FROM MADAGASCAR - 3 pounds of raw rocks includes rose quartz, labradorite, red jasper, yellow jasper, indigo gabbro, and polychrome jasper, quantities of each gemstone may vary

FOUR GRADES OF GRIT - Coarse, Medium, Fine, Polish. Transform your raw stones from rough rocks to dazzling gemstones, this refill kit also works with all rock tumblers

JEWELRY FASTENINGS - Additional rock tumbler accessories include 1 Necklace, 1 set of Earrings, 1 Keychain, 1 Ring to create custom jewelry from your newly polished gemstones