Tank: Look, Mom! It's a bike with a carriage.
Me: Yep.
Tank: There's a baby in there.
Me: Yeah. That's because the kid is too small to ride a bike himself.
Tank: Yeah. ... The baby is riding along like "Ooh, I'm watching a movie," and the dad is like "[panting noise], [panting noise], [panting noise]."
And that cracked me up.