This pendulum clamp is perfect for use on support rods to hang weights and pendulums! Each unit has three screw clamps for holding one to three strings 2 inches apart. The clamp will fit into rods up to 1/2" in diameter. Excellent to keep on hand in a laboratory or science class!
Learn how solar cells transform light into electrical energy with this great kit!
A beautiful desk toy for your favorite person’s office!!
Defy gravity with this cool balancing eagle!
The Hoberman Sphere expands and contracts with a magical motion so fluid and simple that kids can't help but play with it for hours.
An ancient toy featuring optical illusion and hands-on fun that never grows old!
This genuine meteorite is great for the rock collector in your family!