As the pendulum swings, it gently "writes" ever changing geometric patterns in the sand

Features:

1) Secured in its oak stand, the all metal pendulum converts kinetic energy intopotential energy

2) The extremely fine sand (included) provides minimal friction allowing the pendulumto swing for extended periods of time

3) As the pendulum swings, it gently "writes" ever changing geometric patterns inthe sand

4) The patterns get bigger then smaller then bigger again as the arc of the pendulumalso changes

Sand pendulum