Kracker Kraft is an application where the users make fireworks using firework stars. Stars are bits of metals which make trails of colors in the night sky when projected by the explosion of the firework. The user disposes the different types of stars on the firework in different ways to create color and geometrical effects. He can see the immediate effect of the explosion, or he can bring it to a night scenery where the full, chinese style firework will be shot up by an explosive and explode in the night sky. The firework made by the user is displayed in a full-fledged firework simulation.