Make a paper chooser / origami fortune teller, but theme it for healthy eating or fitness
plain paper, trimmed to be square.
Make sure that the paper is square by folding one short edge diagonally to align with a long edge and trim the excess paper off. Fold the paper into a chooser / fortune teller. Instructions can be found here http://www.dltk-kids.com/world/japan/mfortune-teller.htm . When it is complete decorate the outside with healthy foods and put healthy challenges in the inside.