If you place a weight on the end of a piece of rope and let it swing freely, you have created a "pendulum." If you place a fine tip on that pendulum and hang it where the tip can trace a pattern in the sand, you've created a sand art pendulum! And what patterns it creates! These relaxing and intriguing pit and pendulums are beautiful conversation pieces; they make perfect gifts for everyone -- from executives to college students -- or anyone who likes unique scientific things!

This "slate" pit and pendulum has the look and feel of slate, but it's made of a long-lasting and durable resin.

Dimensions:

Small slate: 14" x 5.5"

Large slate: 23.5" x 10"