Not sure what it is with Thing One, but the second his butt hits a chair for a meal, the questions start. His brain doesn't seem to be able to stop moving...he replaces whatever stimulation it was getting pre-eating with deep thoughts, fifth-grade style.
For example, at dinner tonight; both within a 60-second period and completely unrelated to any other conversation going on at the table:
"Is it possible to create water?"
"Are cactuses flammable?"
Never a dull moment at our dinner table!