Divide into two teams. Give each team an empty bucket and a bucket filled half way with water. The buckets should be off equal size and filled the same amount. Place one member of each team a distance of 20 feet from the rest of the team with the empty bucket on the ground at their feet. The rest of each team should line up facing their team mate 20 feet away with the filled bucket at their feet. The object is to move as much water as possible in a pre-determined amount of time (usually 90 second or 2 minutes). When you say "go", one member of each team (let's call them #1) fills the sponge and races to the empty bucket and empties it. #1 then hands the sponge to the team member standing there (#2) who then runs back to the waiting team. #2 then hands the sponge to #3 who them dips the sponge and runs to the other bucket and empties it. They then hand the sponge to #1 who runs to the team and hands it to #4 etc. etc. The team who accumulates the most water wins.