I don't know what game they were playing in the pool, but it was definitely something they made up themselves, with arbitrary rules and nonsensical goals. It looks like they were enjoying it. When we weren't mucking around in the pool, we were riveted to the Olympic Games. At least, I was. I'm a bit of an Olympic junkie.
And the baby, he decided he likee blowing bubbles, jumping into the pool and going underwater, with daddy. Stinky little son of a gun.