The Smithsonian Newton's Cradle includes Newton’s cradle and a color poster with instructions. The kit includes STEM educational content. It demonstrates conservation of linear momentum. Swing one ball or two and observe equal reaction on the other end. It is named after Sir Isaac Newton and his Third Law of Motion.

• Recommended for ages eight years & up

The Smithsonian Newton's Cradle includes Newton’s cradle and a color poster with instructions. The kit includes STEM educational content. It demonstrates conservation of linear momentum. Swing one ball or two and observe equal reaction on the other end. It is named after Sir Isaac Newton and his Third Law of Motion.

• Recommended for ages eight years & up