Divide into two teams. Have one volunteer on each team lie on his/her back with a Dixie cup in their mouth (bottom part in the mouth so that the opening is facing up). Inside the cup are two alka-seltzers. Have each team stand ten feet away from person on the ground with pitchers of water next to the front. On “go,” each team sends one member at a time with a mouthful of water to the feet of the person lying on the ground. They then spit the water out of their mouths, aiming for the cup. Once they’ve spit all the water they have in their mouth, they run to the end of the line where the next person does the same. The first team to get the alka-seltzer to fizz wins.