Schoolboy sliding puzzle

The game is adapted for pupils Fifteen. When starting the game you must select one of the two images, which also happen to collect. Fifteen - is a kind of puzzle, in which the image is divided into squares. Due to the fact that one lacks a square, all of the pieces can be moved. When one gets a piece of the place of the empty square, its own space remains empty. Therefore, you must move the pieces so that each piece into place, then the drawing is logical and complete.