Ornament next to swinging ball. swing one and one will swing, swing two and two will swing?

I had one as a kid. Its an accessory with little chrome ball suspended on strings. I dont know if its magnetic.

Do you know what theyre call? Im trying to find one to buy.


Answers:    Newton's Cradle

Nothing to do with hold.
See:
http://en.wikipedia.org/wiki/newton's_cr...
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