Newton Cradle Pendulum Metal Perpetual Motion Toy & Swing Ba..More

EDUCATIONAL SCIENCE GADGET: Not only demonstrates a pendulum, but also shows the principles of kinetic energy and conservation of momentum. Friction and damping effects are also observed.
RELEASE THE PRESSURE: Perfect for releasing the pressure and killing boring time, When you are tired of studying and working, you can stir the ball to hear the clinking sound to ease.
EDUTAINMENT: Suit for both kids and adults, they could experience the fun of mechanics in the process of playing this fun gadget and explore significant values of physics.
HOW TO PLAY: Pull back one or more of the balance balls, release them and the same number of balls will swing up on the opposite side.
PERFECT DECORATION: Not only a toy, but also a great desk ornament for home or office. Also good for birthday gift and kids toy.