An empty pizza box gets a sporty transformation into a tabletop soccer arena. No need for shin guards, as the kicking is all blown air and the ball is a puff of cotton.

To make the field, trim green poster board to fit inside an opened pizza box, then draw the field as shown. Cut holes for goals at each end and make goalposts from pipe cleaners. Adhere cut-out box-top ads to the arena sides, if you like.
Place the pizza box on top of books or boxes so that the ball can fall cleanly through the goals.
To play, divide your family into two teams. Players use straws to blow the cotton ball across the field and try to score. Soccer rules apply — no hands allowed.