# Twenty worked life-domain source-choice swaps

Two worked fictional settings per day preserve the Music operation. **After Check** means first U/V response has been saved. A picture does not show how a real object sounds, whether a listener hears a contrast, what a community uses music for, or which container holds more.

| Day | Worked swap 1 | Worked swap 2 |
| --- | --- | --- |
| 71 | Paper museum display: A circle and B striped square → two named invented recipes, not two pitches. | Space postcard: two different source keys → one fixed 330 Hz fundamental in the candidate files. |
| 72 | Model library sign: A A A A → one source label at all four places. | Toy harbour flag: B B B B → B repeated, with no A/B boundary. |
| 73 | Game-card score: A A B B → one source switch after place 2. | Textile strip: B B A A → one source switch after place 2 in the opposite direction. |
| 74 | Paper workshop: safe source X + adult gentle stroke → observation stays blank until tried. | Model theatre: source Y + approved tap → source and action are two separate choices. |
| 75 | **After Check:** cardboard exhibition A A B A → changes after 2 and 3. | **After Check:** paper observatory B A A B → changes after 1 and 3. |
| 76 | Fictional station: source P + brush, source P + tap → same object, two actions; no claimed sound. | Map desk: source Q + soft press versus source R + soft press → changed source, fixed action. |
| 77 | Paper boat: A A B B → A B B B by changing place 2 only; switch moves earlier. | Toy garden: B B A A → B A A A by changing place 2 only; switch moves earlier. |
| 78 | Gallery maker: B A A B → two source changes in an original four-event plan. | Space game: A B B B → one early switch; child may choose another purpose. |
| 79 | Child's original A/B paper score received by willing teacher → record actual score share, no acoustic claim. | Approved child-directed sound received by willing adult → record medium and actual reception, not assumed feeling. |
| 80 | **After Check:** paper tower B B B A → one ending change to A. | **After Check:** storybook card A A B B → one middle change to B. |