1. Four table tennis balls roll on a rotating metal hot water service lid. A contact miked bamboo pole positioned like a billiard cue just inside the lid's rim knocks the balls apart when they congregate there.
2. Two wooden beads suspended from a rotating T-arm structure strike 25 tin cans placed in their path. The cans are of different sizes and open or closed. They rest on their sides or ends to maximise pitch and timbral variety.