Pair up the kids (player A and player B) and give each pair a four-foot long piece of string and two marshmallows. At a signal the pairs tie one marshmallow on each end of the string. Player A in each pair holds one marshmallow in her mouth while standing facing the front of the room. Player B stands to the side of player A at an arm’s length, looking toward player A. Moving only her head, player A begins to swing the string back and forth like a pendulum while player B attempts to catch the swinging marshmallow in his mouth. Both players may move only their head, no bending over. The winner is the first pair in which player B catches the marshmallow.