Multiple Exposure Series by Simone Primo. I like these pictures because they cleverly join two pictures together. Because the pictures are in the shape of a person, the picture inside could be representing emotions/feelings.
Guests throw darts at balloons with paint inside. You keep the art. :) This is such a fun Idea. You choose the colors and the size to coordinate with your style - might be more enduring than having a fingerprint tree in your house forever.