Use card-stock to create packaging for six three-star ping pong balls. Package should be able to stand on its own and be hung as it would be sold in a store.
This is an original design of mine, inspired by pop-up books I used to read and make as a child. By making a single slit in the fold of a piece of paper, one could create a beak-like protrusion that would open and close along with the folded paper. I used this "beak" to hold a ping pong ball in place just with the sheer force of tension within the card-stock. The result was a seemingly gravity-defying, floral shape of packaging formed out of just one piece of card-stock.