I was thinking more about PC. I'm looking for a game for my 4 years old to play. He likes gemcraft, but it's to complex for him yet (the concept of combining gems, that some gems are better than others, etc), so I thought that he might like tetris. If you have any other good suggestion in terms of games for kids I'd like to hear them. We already enjoyed plants vs zombies (he was "playing" it since he was 2, now it got old a bit) and some "office" game called Virtual City.