Food idea  Ice-cream to go.   Before the party is over I will give each child in the party a cup of Ice-cream and a spoon to take home with sprinkles that my daughter help decorate and I make rainbow Ice-cream so that they all have the colors they want.  just get different color ice cream at least 4 different flavors you scoop it as a normal ice-cream and place the ice-cream with sprinkles on top of each and freeze for about 3 hours and you serve as they leave to go home less messy too.. instead of ice-cream on the plates.