For working on why questions, emotions, and perspective taking.
Take any emotion cards (I've got a set of happy/upset ones in my store, but feel free to substitute your own) and ask the child to label how the person feels. Then put the card with the person on it inside the box and ask "Why do they feel this way?" You can give them choices or have them identify from the whole set of photos with reasons I put (pretty universal things, like candy for happy and getting hurt for sad).
As always, the image preview is off, there is a thought bubble on the first page.