Newton swings ball and is suitable as a gift for children, friends, family and themselves. 

This classic tabletop toy gives you lots of fun for a variety of places, such as homes or offices, and is a fun device that not only shows the swing but also shows the law of conservation of momentum and energy. Whether you are learning physics, doing complex analysis, or looking for exquisite gifts, this Newton pendulum ball is definitely what you want. 

Materials: Five pendulum balls, ABS Plastic material base, two frames, and fishing line.