Make your own short guide for the helper.
My own try
Read the whole different source
Pretend facts: A paper kit has a closed cover. A Star stamp picture is behind a Circle picture inside. A new helper wants Star. Open the cover before moving Circle. Move Circle aside before taking Star. No actual ink or stamping is used.
Adult reads the whole source neutrally when wanted; exact child-directed recording, pointing/sign/AAC/drawing/type/speech remain available. Match print separately; no voice/neatness/speed gate.