polished rocks

CrunchLabs by Mark Rober The Crunchinator

CrunchLabs by Mark Rober Egg Drop Challenge

CrunchLabs by Mark Rober Elephant Toothpaste Blast

MindWare Elevator Marble Run

CrunchLabs by Mark Rober Slime Prank Lab

Thames & Kosmos Dig It Single Packs

Thames & Kosmos Mega Cyborg Hand STEM Experiment Kit: Science Project For Grades 3-8

National Geographic Epic Science Series Earth Science Kit: Educational Kids Geology & Chemistry Activity Guide

Buffalo Games The Ultimate Prank Box

Think Box Inventor's Box: Science Kit for Kids, Toys for 8 Years Old, Includes Storage Case & Wires

MindWare Marble Run

Buffalo Games The Ultimate Magic Box

National Geographic Gemstone Dig Kit: Educational Science & Geology Activity for Grades 1-9 with Instruction Guide

National Geographic Magnetic Putty: Educational Science Toy with Activity Guide for Creative Thinking

Snap Circuits Arcade Science Kits

Snap Circuits Flight Deck Science Kits: Educational STEM Kit, 2nd to 4th Grade, Boosts Creativity & Motor Skills

Buffalo Games The Ultimate Space Box

National Geographic 3D Motorized Shark Model Stem Activity Kit

National Geographic Completely Gross

Snap Circuits Bric Structures: Educational Science & Engineering Toy for Grades 3-7

Snap Circuits Beginner Science Kits: STEM Learning for Grades 3-6, Includes Instruction Guide

National Geographic Air Rocket with 6 Rockets

Klever Kits 36-in-1 STEM Robot Building Kit - Motor Robot Science KIt Educational Toys Creative Birthday Gift for Boys & Girls Age 8+

Think Box Gemstone Dig