The questions only get tougher

To his parents, after seeing the WAMU radio tower, "Why does the radio come over in waves? How does it get to our radio?"

To his mother, on the metro ride into work: "Mama, where does the sidewalk end?"

And, in a moment I'm not sure I necessarily want repeated, to his female babysitter lying next to him in bed after they have played for a few hours: "What's your name?"