Find each character's purpose.
My own try
Read the whole different source
Asha wants to show a paper rocket's long tail. “Please look at this tail,” Asha says. Olli wants to tell the rocket's story. “Can I put my story card beside it?” Olli asks. They place the rocket and card on a drawn display mat and choose a title.
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.