Making pictures out of leaves
All you have to do is print a high-contrast image onto one of those overhead projector transparency sheets you can get from an office supply store. Then, pick a nice, big leaf from a plant. Put the transparency on top of the leaf in a photo frame. The glass will keep it nice and flat, and in place.
Place the frame on a sunny spot and leave it there for a while. If you live in a dry climate, outdoors is fine; if not, put it somewhere in front of a window. Leave it for at least a few days. In time, the color of the leaf will fade, but the bits that are covered by the ink on your transparency will remain darker.
