Target/codes: revise only B's second round while preserving all A and first B; partial AC9AMUFD01/FC01. Prepare: two copies of child own score, square sound/wait replacements; invitation G.
- Welcome · 3 min. “The backing stays. Try another ending for B.” Offer invented picture/show or no story, private/no-sound routes.
- Model · 4 min. Adult keeps A local 1,4 in both rounds and first B 2,3. B second 2,4 becomes 1,3. Compare both removed/added sounds; only B round 2 changes. More than one feature may shift acoustically in actual live trials—record it.
- Try together · 5 min. Adult accidentally changes A too; learner restores it by corresponding-position comparison. Remove adult score before own making.
- Child choice · 7 min. Child copies an own piece, revises one or more second-round B decisions, and reads or optionally tries first/revised pieces with reviewed quiet sources and willing makers. Child may prefer first, second or both.
- Notice · 4 min. Keep versions, all removed/added local B positions and held A/first B. If count changes, note it; open composition has no required unchanged count today. Adult directions/prompts are recorded accurately.
- Close · 2 min. Child selects a version to keep or share tomorrow by choice. A Music revision does not certify an inventory sum or physical holder test.