Sunprint Refill (4 x 4) Contains twelve 4" x 4" refill sheets of Sunprint paper. This is a refill kit of paper only and does not contain any Plexiglas overlay to flatten objects. Developed by educators at the Lawrence Hall of Science, Sunprints encourage an interest in the photographic process using only sun, water, and a bit of imagination. Place a fern, flower, or other object on the special paper and set it in the sun briefly. Then rinse the paper in water and watch as a beautiful long-lasting image appears. Developed at the Lawrence Hall of Science, Berkeley, California