"What!! Oh, that is, you think 'not much,' probably. What do you want, anyway?"
"I want to play."
"All right; run along and play."
"No; I want to play with you."
"Pooh!! That's silly. I'm an old man. An old man can't play."
"Can, too. My Grandpa can."
"But I'm not your Grandpa, thank my lucky stars. Run along now; I'm thinking."
"So am I."
"You? Huh! A kid can't think."
"Ooo-o! I can!"