Make your own DIY overhead projector for tracing wall murals. Make a makeshift projector using a box, a lamp and some tape. Project the transparency onto the wall. Use a light bulb without the "frosting" on the inside for a clearer picture.
DIY: Mod podge a map to a lampshade.I really like the many suggestions for recycling old maps and atlases. You could even concentrate your shade on specific locations that someone likes to personalize the shade for them.