Tuxpaint can be good for drawing pictures, cartoons, and the like, but if we let it stretch it's muscles there is more that can be done. Maybe use it as a sort of drafting program. A drawing usually has at least four views. They are the front, side, top, and isometric (roughly translated at an angle). If you needed a simple step stool, you certainly can make a drawing to reflect that. In this case you only have a partial isometric, but the point gets across.