I'm expecting a new baby in August, and, though my 2 year old believes without any way to convince him otherwise that there's a baby living in my belly button, his four year old brother is too smart for that and has had to have a whole lecture on how a baby is in there (is it like hatching eggs, mom?) etc. etc.
The only way I could figure on explaining about where the baby was (in response to: how can he BREATHE??? Isn't he squished?) was that the baby is floating in a nice, warm swimming pool.
OK, problem solved. Months ago.
Then yesterday, I was mentioning that our cat looks like she's finally gaining weight and he says, matter-of-fact...
"Well, that's just because the haircut they gave her when they took her swimming pool out is long again."