Item Type: Pendulum Ball <br>Product Material: Plastic + Iron <br>Product Size: Approx. 17.5 x 14.6 x 17.8cm / 6.9 x 5.7 x 7in (There might be small errors in manual measurement) <br>Application: Desktop decorations, gifts, etc.<br>1、Perfectly demostrates for Newton's third law of motion and the principle of conservation of momentum. <br>2、Also, the cradle for Newton is an excellent educational gift for kids, making the studying much more interesting. <br>3、A meaningful and entertaining decoration, suitable for home, office, classroom, library, studio, etc. <br>4、Consisting high quality plastic and steel balls, the pendulum ball toy is very durbals for long?term use. <br>5、Moreover, the assembly of the cradle for Newton is very simple, and you can complete it within minutes.<p>1 x Base</p><p>1 x Pendulum Ball Rack</p>