Make rainbow ice cubes to chill beverages! At least 24 hours before the day of the party, mix up powdered drink mix packets in a various rainbow colors and freeze different colors in ice cube trays. Using clear cups (so the kids can really see the colors), pour clear soda and add colored ice cubes right before serving for a playful and refreshing beverage.
birthday centerpiece idea -- tie balloons on top--fill with any candy. let kids guess on paper how many pieces of candy are in the jar. one who is closest gets the jar at the end. Could work as table numbers/center pieces too!