Come on, you little rascal, it's time to clean up! Leo the Little Mouse may be a small mouse, but he is just like all the other little children in the world. Clean up? No, Leo the Little Mouse has no desire for that at all. He doesn't want to keep things tidy at kindergarten or at home. But the consequences don't take long to show. Even his beloved Super Mouse gets lost in all the mess, leading to an argument with his little sister Lili. In the end, Leo realizes that sometimes cleaning up just has to happen. With beautiful illustrations and loving texts for reading aloud.