1 player. The nondominant hand slaps, raps, or taps the lap or table or any handy thumping-noise making object in steady moderate tempo quarter notes. Tap tap tap tap. Once that is established, the dominant hand does one of two things, perhaps in sequence, perhaps (later) mixed together: 1) it sustains a series of different rhythm patterns that either go with the steady quarters or against them (e.g. triplets, offbeats, etc.) 2) it freely solos over the steady beat. In either case, don’t forget the use and power of including silences. The underchallenged may repeat the game, reversing the roles of each hand.