Sunnytech Low Temperature Stirling Engine Motor Steam Heat Education Model Toy Kit For mechanical skills (LT001)

Tensegrity Sculpture Creative, Puzzle 3D, Anti-Gravity Building Blocks

Thames & Kosmos Hydropower Science Kit | 12 Stem Experiments | Learn About Alternative & Renewable Energy, Environmental Science | Parents' Choice Recommended Award Winner

ThinkFun Gravity Maze - Falling Marble Logic Game - Challenging STEM Toy for Kids 8-12 - Gravity Marble Maze - Brain-Building Fun - Educational Gift - Boosts Critical Thinking & Problem Solving

Toysmith Euler’s Disk – Create A Hypnotic Display of Light & Sound- Science Desk Decor for Home and Office – Physics Toys for Adults & Kids 8+