A length of durable, non-stretch cotton measuring 82 feet (25 meters) long at 1/16 of an inch thick. The string is specially designed for use with any of our pulleys, allowing you to perform experiments demonstrating basic laws of motion and simple machines. Perfect for the physics classroom, and great for use with a variety of science fair experiments.
This kit includes several different projects that demonstrate the power of magnets!
This is a classic demonstration toy of the powers of magnetic fields!
Discover how solar cells make electricity with this awesome kit!
Get swept away by this fantastic robot kit that uses vibrations to move!
Ever wonder how to survive in the wilderness? These cards can help!
Build a model green house and 9 other green energy-related devices with this great kit!