The kids are broken into two groups; Bats and Moths. The ratio should be about five moths per bat.
The bats are blindfolded so that they can't see.
The moths have their legs tied together so that they can't walk, they have to jump around. Note: If you decide to use tape, consider taping over the top of a piece of paper so that you don't damage skin or clothes.
The bats have to hunt the moths by sound, which shouldn't be too hard since the moths have to jump. If a bat touches a moth, it's considered "caught".
The last moths caught get to be bats next time.
You could do it in teams, ie: the first bat to catch 5 moths is the winner.