Gravity Sand Swing Sand Table

Description:
Material: Plastic, Iron, and Natural Sand 
Educational Tool : The pit and the pendulum give spectators first-hand experience of mathematics and physics.
Toy & Gift : Creative gravity sand pendulum is best for birthday / housewarming gift, decompression cure gift, unique kids toys. 
Specification:
Size: 39x16x14cm / 15.35x6.30x5.51inch