Number pegs from one to ten (ten pegs for each number). Break the kids into three groups. Evenly spread the pegs out in the pool then wait until they sink. Once they sink stand each group at one section of the pool lined up. When a whistle blows the first person dives in and collects ONLY ONE peg, brings it back and the number on the peg is added up. After all the pegs are collected, the group with the highest score wins.
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