How to Play: Sponge Tag
What you need: You need a large, soft sponge, like the one you use to wash a car.
How to play: This game is a variation of Tag, using a wet sponge to tag a player.
The rules: Once children have picked who the first "It" will be, "It" will use the big wet sponge to tag another player. Once someone has been tagged, she becomes the new "It."
How to win: The last person remaining who has not been tagged wins.
What else you need to know: It will be impossible to dispute being tagged, as that person will be wearing a wet splat mark on her back.
Related: More Kids' Games
Start by teaching him that it is safe to do so.