Do you know Solar Photopaper? It is sensitive to ultra-violet light and you can make paper prints with a special touch. Just place any object on the paper and expose it 5-7 minutes in direct sunlight - wash the paper 2 minutes - let it dry on a flat surface.
Some objects work better than others, you have to experiment a little. Leaves and flat shapes are working good, but I also like the typographic-like print. I used those old neon coloured plastic letters for it (Pic No.3).