On a hot summer day place on earth banks and pans upside down, To trees or fence lay a few caps or large pots. This improvised drums, and instead of drum sticks, use a stream of water from a garden hose. Let the hose to the child. Let him direct a stream on the "drums"to get the drum sounds and rhythms. Try to change the pressure of the water, hold the hose closer to the "drums" and push it further. Does that change the sound?