Most fun I've had with a pool is in a house where I just went through the gauntlet of raising an infant to child and two Yorkies and their puppy... Things were not feeling all that 'fun'. When the toddler suddenly became chunky I aged her into a child so she could get some exercise, and since it was turning to winter I thought I'd try an indoor pool in the basement rec-room. Added the bubbles too - which was pretty cool since now steam and bubbles were present...
So, I get done and it's a steaming addition to the corner of the basement, and I 'tell' the child to swim in it. Then I look over and the two little dogs are hopping around at the edge of the pool (so I'm afraid they'll drown or something!), then suddenly they jump in, swim around, jump out, jump back in ...rinse and repeat. It was a hoot and I was laughing aloud to myself in the middle of the night like a crazy woman. :D :D :D :D