FOCAULTS HANGING SAND PENDULUM
Hang this Focaults pendulum anywhere, but make allowance for much meditation time as this stunning scientific fascination converts kinetic energy into potential energy. It's intriquing to watch, relaxing & quite therpeutic! Create amazing patterns in the sand as the swinging pendulum gently writes complicated geometric messages in the sand. The patterns get bigger then smaller & bigger again as the arc of the pendulum changes. It will swing for over 5 minutes (depending how deeply you set it) Instructions are included (but hardly necessary) The sand comes zip locked in a plastic bag & it all packs into a box just a bit bigger than the sand tray which is 40 cm across.