These things are brilliant. I bought them for myself thinking they were going to be a fairly short-term plaything. They turned out to be anything but. They are fantastic. Consider most magnets are rectangular with a fairly well defined North and South, these spherical little beggers defy belief. The shapes you can create are fantastic (if you are patient) and the fun never diminishes no matter what you do with them. I would heartly recommend them for 8+ year olds who will love experimenting (isn't that the best way for them to learn - about magnetics anyway) but not younger as due to the size a chocking hazard is a real risk, especially if more that one is swallowed at a time. That said, I am 40+ and have great fun with them and consistently finding new shapes and configurations. Get these, pull the cube into a long string of balls and see what you can do. I defy you to run out of ideas! Especialy if you get another cube of a different colour. A word of warning however, they do come in different sizes so make sure you order Neocubes of the same size (if you decide to get more than one)