Description:
Material ： plastic + iron + 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 / 15.35×6.30×5.51inch
N***k –
bigger then I thought, but as described