Toys For Office Desk
LtytyJ Newton's Cradle - Demonstrate Newton's Laws with Swinging Balls Physics Science Office Desk Decoration (T-Shape)
Toys For Office Desk is very nice product. I love this Newton’s cradle. It is the perfect addition to my desk. Not to mention, my office guests often like to play with it.
You get a solid 52 – 60 seconds of use when you move the ball. Yes, I tested it out :).Promised Review by JB