"Me too," Sam says, trailing after Flo, trying to take a peek at what she's found and Mathias holds his arms out to her so they can look at it together.

"That's very nice," he says to Flo. "Did you know that they're alive? Animals that live in the water."

Maybe she already knows this; it's another area he needs to work out, discovering what it is that little girls do and don't know already. Sam, though, sounds surprised that he's said this and she stares at him for a moment, trying to figure out if that's true or not.