The theory behind zero calorie or negative calorie foods is that they contain such a scant amount of calories that the energy you expend eating them cancels out their calories. Not sure I believe this but still good low calorie snacking
Fruit Santa Pops ~ Cut a large marshmallow in half and place a banana slice between them. Top with a strawberry and small marshmallow. Use a couple of chocolate sprinkles for the eyes and an M M for the nose. Skewer on a stick for a fun fruit pop.