Make it free and suitable: Existing broad paper/board and a familiar suitable tool, or an actually willing adult making on accepted child directions. Check ordinary local access/tool suitability. Usual communication and an exact description are enough; no test of another person's comprehension.
Own activity: Use an actual own message and a genuinely available reply only if wanted. If none, say 'We don't have a reply' and inspect as maker.
Notice without a score: Distinguish intention, actual reply, no reply and a clearly invented adult example.
Optional end: Keep, revise, try a new job or stop. The child need not agree with any suggestion.
The child can stop, rest, ask for help, change the job, keep it private or pass. No child/body movement, sound, spelling, response length, photograph, private details or school return is required. Adult reading/scribing/operation is named; a plan does not become a made work, and imagined people are not real recipients.