Ice cube melting race
Divide children into two teams. The first child in each team has to rub an ice cube between her hands as long as possible, when it gets too cold, she passes it on to the next child. The first team to melt their ice cube wins.
Ice water gun fight
Fill water guns with crushed ice and water. The chilly temperature will make children try harder to avoid getting sprayed. Play traditionally, or make up your own rules, as when players get hit they have to freeze in their position for five seconds.
Ice water balloon toss
Fill water balloons with crushed ice and water. Divide children into pairs, standing a foot apart. Throw the balloon back and forth, taking a step away after each throw. The last pair with their balloon intact wins the game.
Ice water relay
Fill two buckets with ice cubes and water on one side of a field. Place two empty buckets on the other. Divide children into two teams and give each child a plastic cup. The first child in each team must fill up his cup all the way and run to the other bucket to dump it out, trying not to spill any. The next child in each teams runs after the first has dumped out his water. The team with the most water and ice in their bucket wins. Have them run holding the cup on their heads.