The little boy is resolve a math equation in the one picture, and in the other it's playing with his balloons. Your goal is to slide the pieces using mouse, put it together and make the picture. Maybe the first time will be easy, but every next try is more and more difficult. To remember which piece belong in empty part click "background". If you are ready, start and make this two puzzles. Have fun!
en, Free Schoolboy Sliding Puzzle Online