Sunprint paper allows you to take "Solar Photographs by laying things on top of the paper and then exposing it to the sun. When you have finished exposing the image you want you dip it in water and the picture stays."
What you will be needing is just "water, sunshine, and a little imagination for hours of fun making photographic-type prints with the Sunprint Kit."
So how does this work?
"To make a Sunprint, place an interesting object on a sheet of Sunprint paper, expose it to the sun for a few minutes, immerse the paper in water, and watch as a permanent image appears."
Source: Lawrencehallofscience, Via Blogthesietch
Real-life 'Spiderman' Photos & Video
Car Parked on Side of a Building
Solar-Powered Outdoor Lighting System: Corona
Solar Light More Reasonable & Can Reduce Your Electric Bills
Solar Powered Tent