Best Bioassay Systems in 2026

Homogeneous assay for cell viability, proliferation, cytotoxcity and anticancer agents.

Method: Colorimetric assay (570nm). A spectrophotometer or plate reader is required, but not provided.

Samples: Cell culture. Species: All. Detects 950 cells

SO MANY TOYS IN A SNAP: Make dozens of cool electronic gadgets - all from one box! A safe and fun way to introduce children ages 8+ to the basics of electrical engineering! Build exciting projects and toys using the included colorful instruction book!

PROJECTS THEY'LL LOVE: So many fun electric-powered projects you can make and play! Ages 8 to 108 will love building 100+ projects! Have fun while building practical skills and learning the basics of circuitry. Build a flying saucer in a snap and watch it take off and sound the alarm! Kit includes 29 Snap Circuits parts.

GREAT GIFT Give the gift of learning and fun this holiday season! Snap Circuits kits will keep kids busy and having fun all year round. Combine with other Snap Circuits kits for even more projects!

Free PDF tutorial(more than 22 lessons) and clear listing in a nice package

The most economical kit based on Arduino platform to starting learning electronics for those beginners who are interested.

Lcd1602 module with pin header (not need to be soldered by yourself)

Perfect Sewing Kit : The kit contains all the necessary tools that are required for performing basic repairs - be it a needles, threads, scissors, buttons, thimble, threader tools, seam ripper and all sewing tools, everything neatly packaged ready for your use.

Easy to Use : Items won't fall out when you open the case, needles in separate closed box for safety, and other items securely tucked in place with attractive black elastic bands. A kit that in a true sense makes your life easier.

Smart and Compact : Compact design making it convenient to carry in style anywhere you travel. With this kit in your bag, you will never have to find a tailor for the basic repairs, be more self-sufficient and take care of small repairs yourself.

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

Vegan, Non-GMO, Gluten-free & Gelatin-free: Each bottle of Goli contains 60 delicious, vegan, non-gmo, gluten-free & gelatin-free Apple Cider Vinegar gummies, which makes them suitable for almost any lifestyle.

Made in the USA with locally and globally sourced ingredients. Goli Gummies are made in allergen-free, cGMP certified facilities in the United States with local and globally sourced ingredients to ensure that our products are reputable and of the highest quality standards.

Patented Formula, Essential Vitamins, Great Taste: Our patented formula contains essential Vitamins B9 and B12 to help support cellular energy production, immune function, heart health, healthy nutrient metabolism, a healthy nervous system and overall health and wellbeing. Apple Cider Vinegar has traditionally been used for digestion, gut health and appetite. Our unique flavor profile combined with essential vitamins makes Goli ACV Gummies a delicious addition to your daily health routine.

The MEGA complete starter kit with more than 200pcs components, premium quality and 100% Compatible with Arduino IDE

Free pdf tutorial in the cd (33 lessons)

Lcd1602 module and gy-521 sensor module with pin header ( no need to solder by yourself)

EXCAVATE INCREDIBLE PYRITE – Excavate genuine pyrite specimens from each Gold bar-shaped dig brick in the kit and learn more about the Gold Rush and Fool’s Gold in the full-color learning guide

MADE TO SHARE – This Fool’s Gold Dig kit has enough individually-wrapped dig bricks and digging tools to share with friends and classmates. A great collaborative education activity in classrooms or at parties

INSPIRING SCIENCE – The activity kit encourages a deeper love of scientific discovery and earth science, allowing kids to get a hands-on experience excavating and identifying rock specimens

KNOW BEFORE YOU GROW | Grow the healthiest, sustainable lawn and garden with the most accurate and easy to use professional soil test kit on the market

ROOTED RESULTS | Unlike at home ph meters and test strips, our mail-in professional lab analysis measures 13 plant available nutrient levels including Nitrogen and pH

FOR ANY GROWING SCENARIO | Tests any soil type and gardening condition - lawn & turf, vegetable gardening, flowers, compost, trees, vines, ornamental landscape, house plants, soil-less media or hydroponics

【Mechanical Gears】Build a 254pcs 3D wooden puzzle marble run set with big waterwheel lifter and funnel track. Full of gear trains, cams, ratchets and cranks. Loads of fun to rotate the handle and see marbles run crazy on different tracks!

【No Glue Needed】This 3D puzzle is made of durable plywood uses precise laser cutting, so parts fit smoothly together. No tools or glue are required. Rewarding building kit for anyone.

【Premium Pakcage】The model kit comes with all accessories and a pictorial instruction book. Friendly to a beginner of 3D wooden puzzles. Ideal packaging as a gift to friends or family at birthday, Thanks Giving or Christmas.

One bottle of each PuriTEST 10K, 14K, 18K, 22K, Platinum and Silver test acid

4" Scraper / Cutter and Easy to Use Instructions Included!

Premium PuriTEST brand stone included in box.

High Absorption Liquid: The liquid zinc allows more effective absorption than other forms

Health Benefits: Support healthy immune system and highly active athletes with stressed zinc level

Organic Ingredients: PR Labs uses high-quality ingredients and no stearates to formulate products

7 sketch pencils and 3 pigment liner pens let you lay down sharp lines or soft shades. The most widely used graphite drawing pencil degrees are included. From soft to hard: 8H, 6H, 4H, HB, H, 2H and 4H. Pen widths are 0.3mm, 0.5mm and 1mm

Drawing pencils and art pens for everyone, from teens, beginners to established professionals. This compact drawing supplies kit is the perfect introductory or on-the-go travel set

Dual hole metal sharpener means there's never a dull moment (see what we did there?) for your artist pencils. A high polymer eraser ensures smooth, precise cleanup and helps create fading or translucent effects

JSP Premium Gold, Silver & Platinum Testing Solutions 6 x 1/2oz bottles

2 x Genuine PuriTEST Premium 2x2" PRO TOUCH Testing Stone

FREE GIFTS: 5 Gram .999 Gold Clad Test Bar & 5 Grain .999 Silver Test Bar

【Owl Clock Puzzle】This ROKR clock is a self-assembly puzzle and a real clock when assembled. It uses quartz movement and runs silently. 1.5V AA battery is required (not included).

【Wind-up Timer】The 3D wooden puzzle has a 30-minute timer on its back. You can set countdown times for cooking or other events. The classic tick-tock pendulum runs upon wind up.

【No Glue Required】ROKR mehcanical model kit is connected all by mortise and tenon. Precise laser-cutting ensure parts fit well together. Just follow the instruction step by step, and you will make it with proud.

Humans have been working on metal since the dawn of recorded history, it was handmade but it is very attractive. We love it, and we've focused on metal smelting and forging for years. You are ready to begin your metalworking but aren’t sure where to start? Don’t worry, as GONGYI team, we’ve got you covered.

Heating fast, melt aluminum in about 10 mins.

This Propane Smelting Furnace works efficiently with melting Glass, Copper, Aluminum, Gold, Silver and other Scrap Metal Recycle (Can't melt steel). Suitable for DIY, jewelry processing applications.

【ILLUMINATED WORLD GLOBE】180pcs 3D puzzle for adults to craft a 11.5' tall antique-look globe with wooden base and LED. Beautiful for any bedroom or dorm.

【SOFT LIGHT, SECURE AIR】This wooden puzzle comes with a power line to connect electricity. The reassuring light gives kids a sense of security at night. Both practical and decorative once built.

【EASY TO ASSEMBLE】 No glue needed. Made of non-toxic and durable plywood. Comes with a pictorial manual and precise laser-cut parts. Any question during assemby you can aslo contact our customer service.

GOLD, SILVER, AND PLATINUM JEWELRY TEST KIT

HANDCRAFTED WOOD STORAGE BOX TO PROTECT AND PROLONG TESTING SOLUTIONS

AUTHENTIC GTE 2''x 2'' JEWELRY TOUCHSTONE FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY

PuriTEST 3-Pack Gold Test Kit 10k, 14k & 18k Gold Acid Testing Solutions

1/2oz bottles excellent for hundreds of tests!

2x2" Premium PuriTEST PRO Test Stone

FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD, SILVER, & PLATINUM JEWELRY IN SECONDS!

ALL-IN-ONE GOLD, SILVER, PLATINUM TESTING & APPRAISAL KIT

2 AUTHENTIC *LARGE* GTE 2''x 4'' JEWELRY TOUCHSTONES FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY

RETINOL ANTI-AGING STARTER KIT – Perfectly-Sized Products Specially Selected to Introduce Your Skin to the Beautiful Benefits of the Original Retinol Skincare Line

AGE-DEFYING SKINCARE ON-THE-GO – Ideal for Travel or Anytime You Want to Conveniently Take Your Anti-Aging Skin Renewal Care Routine with You

CURATED COLLECTION – Cleanse, Treat, Repair & Hydrate with Top Selections from Our Anti-Aging Skincare Regimen; Chosen for Noticeable Results, Decision-Free

Enables you to test & weigh samples... Make sure you're receiving your money's worth when purchasing precious metals!

Six (6) half-ounce bottles of PuriTEST test acids- 10k, 14k, 18k, 22k, Silver, Platinum Testing Acids

DigiWeigh DW100AS electronic jewelry scale with batteries, calibration weight, and Lifetime Warranty

Beautifully finished wooden box.

Convenient for on-the-go or workspace testing.

Ideal to keep all your gold testing equipment safe and protected.

PREMIUM QUALITY: Updated V1.2 on 1/30/23 in response to customer feedback. Easier to build and break down, thus reducing the chances of user-induced ripping. The Bella Bora Still Air Box mushroom grow tent, glove box is built to last. U.S. Design Patent No. D975,310S & D983,991

EXPERT SUPPORT: Get expert mycologists support. Grow mushrooms without spending high costs on a laminar flow hood mycology.

IMPROVE YIELD: Higher success rates for mushroom grow box, mushroom fruiting chamber, hydroponic plants, inoculating petri dishes, spore syringes, liquid culture, and plant tissue culture.

Latest Generation of Formaldehyde Air Rapid Test Kit for home, office, automobile etc. indoor air quality test.

Rapid and semi-quantitative testing of air formaldehyde without the need for any equipment.

Great for on-site testing of formaldehyde inside a car, a room or furniture.

Kit for digging Real Gold, pyrite, Rainbow Stone or Obsidian Stone out of clay brick

You will find Real Gold in 1 od 24 Boxes

Clay is made easy to dig into

Gold Test Acid Tester Kit 10k 14k & Testing Stone

Test Air Quality: Designed to help keep your family safe, our DIY kit determines if Formaldehyde Gas (HCHO) is in your home. Suitable for areas up to 270 square ft, use only one kit per room. To inspect the whole house, use one kit per room.

Fast, Reliable Results: To test, just follow the 6 steps outlined in the included manual. Keep air temperature and humidity unchanged while testing. You'll have visual results in 30-50 minutes. This test should only be used for your home or office.

For Better Readings: Turn off ventilation, air purifiers and anything that may affect the air for at least 8 hours prior to testing. Store unused kits in a dry, dark place. The expiration is 2 years from the production date printed on the package.

6 pack PuriTEST Gold/Silver/Platinum Testing Solutions 1/2oz Bottles

PuriTEST PRO Touch Test Stone 2x2"