If you are searching for something a bit more special then you should take a look at the Heureka shop at Kamppi. Here you find lots of products that are not just fun. In most cases they are also educative. How about e.g. a language game, a learning computer or maybe a microscope? And there is also something for adults. If you are into solving puzzles this is the place to go. Also take a look at their cast puzzle collection.