I've realized today that his swimming is pretty good. It's mostly doggy-paddle, but occasionally his butt is near the surface and he has some real forward momentum. It also helps that he doesn't seem to care or worry about getting to the edge, he just keeps moving along. Which is, after all, the key: not to freak out and just gently glide along.
Too bad the pool keeps serving lunches the kids don't like. More tuna sandwiches for me.
On another note, he's working on making himself fart, so make a trifecta out of burping on command and cracking his knuckles. But the potential for accidents in his latest endeavor is what worries me.