I admit, I actually had the little game for me ordered because I have loved Tetris and co, I thought, I am casting my times a little time with the real version of such a game. When it arrived I was unfortunately, as now even with a really nasty virus flat so that I found it quite tiring to occupy myself with the game. The difficulty can be selected freely, the solution booklet helps a helping hand when it should not go any further. The Starter level were too easy, even in the feverish mind, so elected the next level, as it was a bit knobeliger, but still quite simple, the next difficulty I then perceived as appealing, the final grade is already really challenging and it takes a long time to resolve it. Our 9 year old nephew came to visit, also set by a disease easily incapacitate and focused on the game while I was asleep. He is a very quiet child that even very busy with such puzzle games alone and he has quite a high frustration tolerance, meaning he knobelte merrily to himself and seemed not to be bored. I could, however, imagine that the game for children who have little patience and hard to sit still and think, can be found less appeal. For boring car trips or waiting at the doctor or the like, I guess the games but as a really useful and good. It does not take up much space in your pocket, is stable and easy.