The device demonstrates the conservation of momentum and energy through a series of oscillating spheres of the same size.When a ball at one end is lifted and released, the force generated passes through the line and pushes the last ball up.This cradle model can change the color of the ball itself when it is opened.It can be placed on a desk, at a home desk or on a shelf, which will be a cool desktop toy.It can be an great gift for friends, family and yourself.This physical toy can also be used as a decompression toy to give you a good time.

Specifications:

Color: red,black.Material: glass,fishing line,plastic.Size: 15*15*11.5cm(M),12*12*9cm(S)

Note:

There may be little color differences depending on the resolution.There maybe a slight error due to different measurements.

Package included:

1* pendulum model.