PeekSeekSo is a game you probably know from when you were a child - the memory game that trains your memory.
You can play this game with different tile sets and different backgrounds, and if you run out of tile sets, you can purchase additional tile sets.
Some tile sets can have an educational mode, meaning that the matching tiles arent identical - for example, with the letters tile set you need to match a capital letter to a small letter, which may be appreciated by many children, craving for knowledge.