It's also usually not the thing itself that they are valuing.
It's the interaction. She wants you to read the same book to her because she knows that you do the voices and act it out and she gets to interact. That's the point. If you ask them, they'll tell you what they value. You don't have to think your way around them, they know, even by the time they're 3 or so. People have desires, and they can tell you what they are, with some help and elicitation.