Demonstrates that white light is composed of different colors by rotating hand-driven wheel. Color wheel has 7 colors and is 7.75 inches in diameter. Constructed of sturdy metal. Great for classroom demonstrations.
A massive mounted set of 100 rocks and minerals found in the US,
Working model representing the sun, earth, and moon and their relationships.
A combination of three of our great discovery toys, all in one package!
Illuminate both your room and your mind with this ingenious Periodic Table Lamp.
NEW 2016 DESIGN! This hip red tee features Pi to 1000 decimal places on an ultra soft 100% cotton shirt.
Every kid needs one of these spheres!