This Newton's Cradle is perfect for my office and desk area. My kids love to experiment with it and I've been using it to help them learn, so that's a bonus right?It does what it's supposed to, and I don't have any complaints. It came boxed where the bars were separate from the base, and all I had to do was set them in. I didn't have to string the balls onto the bars or anything like that, so it was very simple to set up.It's a smaller version of what I think of when I think of a Newton's Cradle, but that's why it's so easy to have on my desk.I'd definitely buy one of these for somebody as a gift, especially a kid. It does have me interested in finding a larger one... for science of course. Certainly not to play with... because I'm an adult.