Pit and Pendulum, 12" Creating Designs in Sand

Grand Illusions

pit pendulum 12 designs sand  

Mesmerizing and addictive! More than an elegant desktop execu-toy (although it is that too!) The Pit and Pendulum demonstrates real science. -- Secured in its oak stand, the all metal pendulum converts kinetic energy into potential energy. The extremely fine pit and pendulum 12 creating designs in sand sand (included) provides minimal friction allowing the pendulum to swing for extended periods of time. As the pendulum swings it gently "writes" ever changing geometic patterns in the sand. The patterns get bigger then smaller then bigger again as the arc of the pendulum also changes. -- Comes with a 12" black stand with bowl-type base, bag of sand, and instructions.

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