Bbtradesales Wiki Newtons Cradle

It’s okay. The perpetual motion doesn’t last long because the spheres are light, and it’s a bit flimsy, but I’m not sure I’d expect more for this price.I bought this to show to the kids - it won’t last long, but it’s a bit of fun and demonstrates the principle.

For the price, this is great. It's not the most stable one I've ever seen and it only goes for about 45 seconds, but I wasn't willing to pay 5+ times the price just to amuse the kids for a while.

Looked okay when received, opened the box and tried it out and one of the metal swinging balls was out of place, I assumed it could be moved back into place but it diddnt and isn’t staying in place. Very flimsy frame.

It was to replace a science museum unit, luckily it fits over the base of the old unit. As there is no weight in the base it slides and looses momentum. If it is held securely it should be fine

Boyfriend always wanted one of these so bought him this for Christmas. Unfortunately, the string broke and the metal frame started to rust within just one day of taking it out of the box. I know it’s cheap, only meant to be a little stocking filler, but I expected it to last longer than one day.