Features: <br>The pole and bracket of the permanent ball and the base are made of high quality plastic. <br>Principle: Swing the ball by the force of the hand, then use the energy converted by the battery to continue swinging until the battery is dead. <br>Creative design, rich colors, beautiful appearance. <br>A wonderful addition to decorate your living room, bedroom, office, etc. <br>It is also a nice gift for your kids, friends, families, workmates, classmates and more. <br> <br>Specification: <br>Material: Plastic <br>Color: Shown as picture <br>Battery Type: 4 x AA batteries (NOT included) <br>Weight: 230g (approx.) <br> <br>Package List: <br>1 * Newton Pendulum Ball<br>1、The pole and bracket of the permanent ball and the base are made of high quality plastic. <br>2、Principle: Swing the ball by the force of the hand, then use the energy converted by the battery to continue swinging until the battery is dead. <br>3、Creative design, rich colors, beautiful appearance. <br>4、A wonderful addition to decorate your living room, bedroom, office, etc. <br>5、It is also a nice gift for your kids, friends, families, workmates, classmates and more.