Great reference card for chemistry and physics students.
See the solar system in action!
A perpetual motion model of the galaxy, makes a good desk toy.
Build 20 different solar powered models with unique building pieces, controlled by an RC handset!
This 1mW, 532nm Super Safe Green Laser Pointer is for education, government or other settings where safety is a concern.
Build a tumbling robot that gets up right after it has fallen down, without any outside help!