Rhyming verse from Brian P. Cleary presents the fictional Clip-Clop Elementary School's celebration of "Onomatopoeia Day." Enthusiastic young students make their way from band room (Rattle Boom Twang ) to the gym (Whiff Whack Swish ) to the science lab (Hiss Spurt Ding ) and beyond. Brief back matter offers additional examples of onomatopoeias--words that imitate sounds.