Caleb: I don't know if you 'member or not, Dad, but it was just my birthday. So I'm four now.
Dad: I think I recall something about a birthday...
Caleb: Yeah. Don't forget - I'm four now. But when I am old like you, I won't have any hair. How old are you, Dad? Eighteen?
Dad: Not quite.
Caleb: When I'm as old as you, I'll be eighteen with no hair. But now I'm four. Maybe next year I'll be eighteen. But probably I'll be fourteen. Maybe just ten, but with hair.