DIY Newton's pendulum stem toys for kids

Physical STEM Science Kits Specifications:
Material: Wood, Plastic
Overall height: about 110 mm
Overall length: about 145 mm

Overall Width: about 100 mm

Weight: about 95g

Suitable age: 4 years old+
Ability development: physical and mental exercising, interest training, intellectual development, emotion, parent-child communication, interactive toys

Newton’s pendulum is a tabletop demonstration device invented in the 1960s, in which five spheres of equal mass are held in place by a sling and arranged closely with each other.  Also called Newton swing ball, the law of conservation of momentum, permanent motion ball, logistics billiard ball, collision ball and so on.