Turned out to be a great Christmas present for a 14 year old who's got nearly all the video games in the world and wouldn't find anything else exciting.
(He really enjoyed this one ;) )
It's fun to learn the tricks and once you master them it really is amazing to watch.
It is quite educational as you learn a little bit about how the human mind works and consequently, how you can trick it. It also teaches you that practice makes perfect.
Don't let babies, toddlers or pets near the toy though as some of the items can be swollen and/or broken quite easily.
The item does state it is for ages over 8 but I wouldn't give it to anyone younger than 12. They wouldn't understand the tricks and would probably end up losing pieces making it useless.