My children love these! Surprisingly I'd say adults would love them too. They make amazing fidget toy. I think it's because of the magnet and the part where you can pull apart the skeletons. It's in there pretty good and doesn't slide out easy. Really smooth. It's one of those things that can only be appreciated while you hold it. Really simple design but I can't help but get addicted carrying them around. I bought another sete for my mate. These toys are worth it. I'm going to buy anything you guys come up with. Superb quality!