C09 · museum cards
A made-up museum card set uses SHELL for an invented shell drawing and BONE for an invented bone drawing. The request is SHELL.
Choose an own idea
Invent a creature exhibit with one card and a useful local key. Try an own idea before the adult reasoning; all own places start empty.
Draw/point/direct/write/speak/sign/usual communication or neutral faithful scribing. Use full descriptions, broad outlines or patterns; no colour-only/mouse/counting/speech prerequisite.
Adult ordinary reasoning after an own attempt
SHELL returns the drawn card; no specimen identification is supplied.
A different option
Add a second invented shell drawing only if you actually create it.
Ordinary teaching source exposure. This is neither an actual event nor a held response.