Newton's Cradle 7.25" Desk Toy - 5 Stainless Steel Balls Pendulum Physics Science Demonstrator for Office Decor, Stress Relief & Educational Gift

I can remember playing with one of these at my grandparents home when I was a kid. It was constructed differently - all wood frame, bigger steel balls actually glued to cotton string with big globs of yellow glue (probably rubber cement) - so it could take a lot of abuse of twirling the strings, wrapping them over the wooden bars, etc. Like everything these days, this replica is not as well constructed or sturdy.However, that said, the concept is still the same and my son just loved watching those steel balls click and clack. There is some educational value if you get info about gravity and the physics of motion, which my son found online. Every kid that sees it has to play with it but I can tell that it will not last if not handled carefully. It is a fun novelty item, will definitely be nostalgic for anyone born pre-1970 and the price is reasonable for what you are getting.