We meet Sam and Isaac at the corner of the playground. They got there earlier but waited for us, leaning against the fence and talking about Isaac's new bicycle. Sam has dark, curly hair that he keeps up in a hat. He has a little brother but didn't bring him today. "Where's Teddy?" I ask him.
"Home. He's having a birthday party?"
"How old is he turning?" asks Alice.
Isaac snorts. "Imagine being so excited about turning ten."