10 Best Slime Science Kits For Kids Age 8 12 of 2025

Tested and Reviewed: Top 10 Slime Science Kits For Kids Age 8 12 deals with expert ratings from 8.1 to a perfect 10

June 2026 Edition

Editor's Choice

9.7

Blue Marble

NATIONAL GEOGRAPHIC Mega Science Kit - Glow in The Dark Lab with Crystal Growing Kit, Slime Making, Glowing Putty, and More Science Experiments, Slime Kit for Boys and Girls (Amazon Exclusive)

Editor's bottom line:

“This slime science kits for kids age 8 12 is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

EVERYTHING KIDS NEED - Make your own slime, grow your own crystal, make putty light up, and marvel at a fluorescent wernerite rock specimen!
WHAT MAKES IT GLOW - Our full-color Learning Guide teaches why the crystal, do-it-yourself slime, wernerite, and putty in your kit glow, and much more!
EXPERIMENT TOGETHER & SHARE THE FUN - Use this science kit as part of quality family time, in home school curriculum, or in the classroom!
KID-FRIENDLY INSTRUCTIONS - Experiment steps are clearly written and easy to follow, making the set even more enjoyable
AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!

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Picked by 397 people today

9.5

Blue Marble

National Geographic Gross Science Kit - 45 Gross Science Experiments- Dissect a Brain, Make Slime, Creepy STEM Project for Boys and Girls, Birthday Gifts for Kids 8-12 (Amazon Exclusive)

Main Highlights

SUPER GROSS MEANS SUPER FUN - Science kits are way more fun when the experiments include boiling boogers, creating glowing worms, and making a test tube vomit! Includes everything for 15 super gross experiments, plus an additional 30 using household products.
EASY-TO-FOLLOW-INSTRUCTIONS - The experiment guide has kid-friendly instructions with illustrations for each step, and fascinating insight into the science at work in each totally gross experiment. This is one unforgettable educational toy!
EVEN MORE TO EXPLORE - When kids' science gifts offer this much, there's no going wrong! The bonus booklet inside contains 30 easy experiments, all using common household items! It's one of the most exciting science kits for kids around!
HANDS-ON STEM - While kids are enthralled by all the yucky fun, they'll be learning about polymers, chemical reactions, pH science, and a lot more! This is a hugely entertaining science toy for kids and a fantastic STEM set for boys and girls alike.
HIGH-QUALITY EDUCATIONAL TOYS - We're proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!

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9.5

Save 10%

Dan&Darci

Slime Kit for Girls Ages 8-12 - All-in-One DIY Slime Making Kit, Galaxy Unicorn Glow-in-the-Dark Slime Set, Birthday Gift for Tween Girls 8 9 10 11 12

10% Off

Main Highlights

EVERYTHING INCLUDED - This all-in-one slime making kit packs the activator, glitter mix-ins, mixing bowl, and step-by-step recipes kids need, so no extra ingredients or trips to the craft store required.
8 WOW-FACTOR SLIMES - Mix a galaxy slime, silky unicorn, glow-in-the-dark lantern, color-changing chameleon, fluffy ice cream, shimmery pearl clamshell, and aquarium cube to make and proudly display.
GO-TO TWEEN GIFT - A standout birthday and Christmas gift for girls ages 6, 7, 8, 9, 10, 11, and 12, this slime set arrives ready to wrap for tween daughters, granddaughters, nieces, and best friends.
SNEAKY STEM LEARNING - Kids follow recipes, measure ingredients, and watch a real chemistry reaction unfold, turning this craft kit into a hands-on science kit and homeschool-friendly arts and crafts project.
SCREEN-FREE SENSORY FUN - Stretchy, squishy tactile play calms busy hands, makes a great fidget and stress-relief toy, and keeps kids entertained for hours at sleepovers, birthday parties, and rainy indoor days.

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9.2

Blue Marble

National Geographic Incredibly Gross Science Kit – 16 Disgusting Experiments with Bonus Guide, Yucky Slime Chemistry Set, Learning Toy, STEM Project for Boys and Girls, Birthday Gifts for Kids 8-12

Main Highlights

INCREDIBLY GROSS SCIENCE EXPERIMENTS This kit includes everything kids need to conduct 6 yucky chemistry experiments: popping blood cells, boiling boogers, dissecting a brain, making squishy eyeballs, creating gooey guts, and growing glowing worms.
BONUS GUIDE WITH 10 MORE EXPERIMENTS Includes an extra experiment booklet packed with gross science activities that use common household items, extending the fun and encouraging repeat experimentation.
HANDS-ON GROSS CHEMISTRY LEARNING Wildly icky results grab kids' attention while real chemistry concepts come to life through tactile, engaging experiments they wont forget!
FASCINATING GROSS FACTS Each experiment features fun explanations that reveal the real science behind the slime, goo, and reactions kids love.
AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!

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9.0

Playz

Playz Edible Slime Candy Making Science Kit for Kids Ages 8-12 Years Old - Food Science Chemistry Kid Science Kit with 25 Experiments to Make Slime Chocolates, Educational Science Kits for Boy & Girls

Main Highlights

DELICIOUS SLIMY TREATS - Inspiring young kids to learn has never been easier or more delicious with the best candy making kit for kids! Make slippery slugs, slimy eyeballs, icky worms, mucky sour candy, oozing hot chocolate, and much more gooey food goodness through these kids science experiments.
EASY TO FOLLOW - The fact-filled colorful lab guide in our DIY kids chemistry set is full of pictures and information presented in a children-friendly way. It's like an easy bake oven for kids, making it one of the best kids science toys for boys and crafts for girls ages 8-12.
EXCITING EDUCATION - Combine STEM concepts to unleash a massive amount of learning potential in children and teenagers with our science kit for kids 8-12 and up. Best Christmas and birthday gift for boys, girls, & teens who love an unforgettable chemistry kit packed with amazing science stuff to create dreamy delicious snacks.
LOADED WITH VALUE - Filled with over 25 experiments, a 20 page activities and lab guide, and over 25 tools & ingredients, our Edible Slime Candy making kit offers only the best science projects for kids ages 8-12. The ideal "my first science kit" with a real science lab feel. STEM for kids has never been this tasty! (Some additional common household supplies may be necessary for some experiments)
TRUST OUR PLAYZ PROMISE - Do your research! You know the quality you will get when purchasing a Playz educational science kit. If you are unhappy with your purchase, contact us anytime for a refund.

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Best Value

8.8

Save 11%

UIVIEHIR

UIVIEHIR Science Exploring Slime Kit for Kids, Crunchy Slime, Stress Relief, Minerals DIY Toy, Party Favors for Girl Boys 6 7 8 9 10 11 12

11% Off

Main Highlights

COMPLETE EXPLORATION KIT: Features colorful slime bases, glitter packs, crystal decorations, mixing tools, and themed accessories for an exciting mineral exploration experience
SENSORY DEVELOPMENT: Crunchy texture slime provides engaging tactile stimulation while kids create unique mineral-inspired designs with sparkly elements
EDUCATIONAL VALUE: Combines creative play with learning as children explore textures, mix colors, and discover properties of different decorative elements
IDEAL GIFT: Best for birthday gifts, prize, party favors. Suitable for kids 6 7 8 9 10 11 12
VERSATILE CREATIVITY: Jumbo Kit with multiple slime colors and mix-in options allowing kids to create countless unique combinations and textures

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8.6

Original Stationery

Original Stationery Galaxy Slime Kit for Kids Ages 8–12, DIY Space Slime Set with Glow-in-The-Dark Stickers & Galactic Glitter, Fun Cosmic Craft for Creative Play, Birthday Gift for Boys & Girls

Main Highlights

Galactic Crafting Delight: Embark on a cosmic adventure with the Original Stationery Galaxy Slime Kit, ideal for girls aged 8-12. This slime making kit features glow-in-the-dark stars, allowing young crafters to create mesmerizing galactic designs
Sparkling Crafting Fun: Discover the joy of crafting with glittery pink, purple, and blue slimes included in this slime kit for girls ages 8-12. Perfect for 10-year-old girl birthday gifts, this kit offers a variety of vibrant slime add-ins
Imaginative Exploration Tools: Foster creativity and imaginative play with this glow in the dark slime kit, designed for girls toys 8-10 years old. It provides essential supplies for hours of entertainment and crafting sparkling mementos
Perfect Gift Option: This slime kit for girls is an excellent choice for gifts for girls 10-12, offering engaging activities and creative exploration. It serves as a cherished memento for any young girl who enjoys hands-on crafting adventures
Comprehensive DIY Kit: This make your own slime kit includes everything needed for a fun and creative experience. From fluffy slime to glow-in-the-dark elements, it is perfect for girls toys 8-10 who enjoy vibrant crafting experiences

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8.3

Blue Marble

NATIONAL GEOGRAPHIC Mega Slime Kit & Putty Lab - 4 Types of Slime Plus 4 Types of Putty Including Magnetic, Slime Kit for Boys and Girls, Sensory Toy & Science Kit

Main Highlights

8 FASCINATING VARIETIES OF SLIME & PUTTY - Including premade magnetic putty, fluffy slime, glow-in-the-dark putty, liquid slime, color-changing putty, snotty slime, bouncing putty, and 1 DIY glow-in-the-dark slime lab. This STEM kit makes a great gift for boys and girls!
COMES WITH STORAGE TINS AND ACCESSORIES This kit comes with 8 storage tins to keep your slime and putty collection safe and organized. This fun and educational slime and putty lab can help inspire a lifelong love of science!
EXPLORE THE SCIENCE Our full-color Learning Guide explores the fascinating science behind slimes and putties. Learn incredible facts about the ooey, gooey world of these squishy substances!
QUALITY TESTED and NON-TOXIC These non-toxic formulas are tested and 100% safe for kids and adults. This kit makes an excellent STEM activity or gift for kids.
HIGH-QUALITY EDUCATIONAL TOYS - We're proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!

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8.1

Save 10%

BenBen

BenBen Science Kit for Kids Ages 8-12, 105 Hands-On Science Experiments with Paintable Volcano, Slime & Tornado Lab, STEM Gift for Boys Girls

10% Off

Main Highlights

105 EXCITING HANDS-ON EXPERIMENTS: Create erupting volcanoes, make stretchy slime, build colorful tornadoes, and explore over 105 interactive science activities designed for curious kids ages 8-12
PAINT & CREATE YOUR OWN VOLCANO: Kids can paint their own realistic volcano model before bringing it to life with exciting eruption experiments for an immersive STEM experience
FUN & ENGAGING STEM LEARNING: This advanced science kit encourages creativity, critical thinking, and problem-solving through exciting hands-on experiments kids can see, touch, and enjoy
EASY INSTRUCTIONS & SAFE MATERIALS: Includes a full-color illustrated step-by-step guide and CPC & ASTM F963-17 certified materials, making science fun, safe, and easy for young scientists
AMAZING GIFT FOR CURIOUS KIDS: Packed in a premium gift-ready box, this science kit is the perfect birthday or Christmas gift for boys and girls who love slime, volcanoes, chemistry, and creative activities

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8.1

Greek Science

Greek Science 75+ Gross Science Kit for Boys, Science Slime Kit, Christmas Birthday Gift Ideas for Kids 8-10-12, Chemistry Set with Brain Dissection, Poop Experiment, STEM Toys

Main Highlights

The Grossest Science Kit for Boys: Why slimy or yucky things make kids laugh?Kids love gross things, and these gross science slime are just the thing to keep them interested. If it sparks their curiosity about science, then why not embrace it? Try these gross science experiments-- vomit test tubes, atomic pee, bleed drizzle, exploding bags and more-- they may capture boys' attention and boost their hands-on skills!
EXPLORING THE GROSS HUMAN SCIENCE: The gross chemistry set is full of slime science experiments like dissecting the brain, making creepy eyeballs, making bubbly snot, exploring blood, diy poop, and making lungs, livers, tongues, and other organs. These wacky activities will keep little explorers busy! Get ready for some squishy, sticky and fun science experiments!
Ideal Gift for Curious Boys: The Greek Science STEM kit is designed for boys ages 6-8 and 8-12. The disgusting science kit is the perfect gift for special days like Christmas, birthdays, holidays and more.This specially designed disgusting slime and science experiment kit helps inspire a lifelong love of science and provides unforgettable gross science moments for parents and kids alike!
51-PAGE FULL COLOR GUIDE: With easy-to-follow instructions and illustrations for each step, this DIY science kit is perfect for hours of play for boys ages 6-12, making the science behind the gross fun and engaging. 51- Teaching kids to observe changes and relate them to real life has never been easier or more happily!
HIGH QUALITY FUN AND EDUCATIONAL TOYS: The safe formula of slime and other science materials in the kit have been thoroughly tested to meet strict safety US toy standards, ensuring worry-free experiences for parents and children as they unlock the wonders of nausea and explore the infinite possibilities of science.

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Our Best Overall Choice

Best Choice

9.7

Blue Marble

NATIONAL GEOGRAPHIC Mega Science Kit - Glow in The Dark Lab with Crystal Growing Kit, Slime Making, Glowing Putty, and More Science Experiments, Slime Kit for Boys and Girls (Amazon Exclusive)

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

EVERYTHING KIDS NEED - Make your own slime, grow your own crystal, make putty light up, and marvel at a fluorescent wernerite rock specimen!
WHAT MAKES IT GLOW - Our full-color Learning Guide teaches why the crystal, do-it-yourself slime, wernerite, and putty in your kit glow, and much more!
EXPERIMENT TOGETHER & SHARE THE FUN - Use this science kit as part of quality family time, in home school curriculum, or in the classroom!
KID-FRIENDLY INSTRUCTIONS - Experiment steps are clearly written and easy to follow, making the set even more enjoyable
AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!

Show Price

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