A silent rhythm picture
Given: Choices LONG and SHORT, labelled long bar and small square; LONG→A “A long line pattern”; SHORT→B “A short line pattern”. There is no sound or music recording. Job / invitation: Pick an invented visual rhythm without hearing requirements. Worked: LONG opens A. It does not play an instrument. The key makes the bar meaningful; its length alone is not a cultural or musical symbol. Next: If sound is expected, read the complete no-sound source, and let the child choose whether to keep a picture-only purpose. Optional own movement remains a separate chosen action.