This improv game is in the following improv game categories:
Everyone forms a backline. One person steps forward and says what object he is and what his function is, like "I'm a paperclip, and I hold loose papers together." A second person steps up and says what object he is, and what his similar function is, like "I am a rubber band and I hold loose pieces of mail together." At that point a pattern is established and everyone just steps forward one-by-one and heightens the pattern: