Materials: Bathing suits, balloons filled with water, chairs and party guests.  Divide the guests into little groups, than set up the chairs outside at equal distances.  Place a water balloon on each chair and extras next to the chair.  Have the groups line up across from the chairs. When the race begins, the first person in each line runs to pop a water balloon on the chair.  As soon as they pop the balloon they place another one on the chair and run to touch another team players hand and they then run to pop a balloon. The team to finish first wins.