Simply shake them back and forth to produce a loud clapping sound. Clappers are perfect for "handling" out at games, celebrations, and other rallying events. Give your favorite team a hand! Clappers are fun for eveyone and designed to make plenty of noise. Make some noise at the big game with these promotional hand clappers. Complies with ANSI, CPSIA, Prop 65. 7.5" H x 3.25" W