Divide the group into two teams. Provide each team with a straw and a marble. At the word "Go," the first player of each team places his marble on the floor and rolls it to the other end of the room with his straw. Then he/ she runs back with the straw, handing it to the starting point. Each step is repeated until all players have had a turn. The winning team is the team which finishes first. Dads can play against children or each team can consist of dads and children.