A fun game to play to get everyone wet - especially if they start out dry.
Swimming pool Water hose
Everyone walks clockwise around the outside of the swimming pool without stopping. One person is in the pool with a water hose under the water which is turned on. Everyone sings, "London river's flooding up, flooding up. . .my fair lady" (same as London Bridges) as the people walk around and whenever "flooding up" is sung the person with the hose can move the hose out of the water and spray a person. Then, the part in the song which says, "Take the key and lock her up," you will hold the hose out to a person and this person holds the hose and jumps into the water. Continue until everyone is in the pool.