You could make it like a hot tub. Awesome Forget the plastic variety, here's the ultimate kiddie pool: A galvanized stock tank that can be kept cool or warmed with a pump that circulates water through a coil on the grill.
Dog Pond - Place a plastic kiddie pool in the ground. It'd be easy to clean and looks nicer than having it above ground. Big dogs can't chew it up or drag it around. This is obviously more fancy than a plastic kiddie pool underground, good idea thou
10 Different and Great Garden project Anyone Can Make 10
Added a hole in the kiddy swimming pool, and put in a standard cork. The bottom I made a makeshift septic system. So you put out the plug, it drains, Spray it with a hose. Great idea for in-ground kiddie swimming pool in sand pit area.