13. Rocks

A: Put the rock back where you found it.

B: But I like the rock, mommy.

A: So do the animals that live here.

B: The animals have many rocks. I just want one.

A: But animals need the rocks, and you don't.

B: What do they need them for?

A: Some animals make their homes with rocks.

B: Very small animals?

A: Yes. You might be taking someone's ceiling!

B: I don't want to ruin their homes.

A: Good. Please put it back.

B: I'll go leave it where I found it.