What is the name of those metal balls that move when you get 1 to hit the stack and they all bounce?

Question

I know the question is quite vague, however i've always wanted to buy one of those things, a lot of office works have them on their tables, you know it applies the third law of newton, 5 metal balls attached by 5 thin metal strings bouncing 1 off another.

Answer 1

Is it pinball?

Answer 2

They are called Newtons Cradle. Here's a link for you to browse:

http://www.officeplayground.com/newtonsc...