My 5 year old son loved this Nintendo DS game, but he acquired all 25 animals in three days. As this was his first "gaming" experience, it was not very challenging. "Maze Munch" is the only questionable content (i.e., lions eat/pounce on zebras...no blood), but my son did not want to play the maze games where his character was chased (i.e, grouper catches/eats clown fish, fox catches skunk)...also, some intimidating music with the grouper/clown fish. Very educational...lots of fun animal facts...very enjoyable!