Share simple roles
A parent checks the space and instructions while the child chooses from suitable activities. Pause between turns to avoid collisions in front of the camera.
Cooperate instead of comparing scores
Try a shared aim such as preparing well or remembering the sequence. Avoid using app scores to compare siblings of different ages and abilities.
Finish with a question
Ask what was enjoyable, what was difficult and what they would change next time. These answers matter more than making every session longer than the last.