Nice way of giving chicks a reasonable amount of room while they're still small, but you're going to want a lid on that in a couple weeks when they start to fly.
If you already have a kiddie-pool it is the quickest and cheapest way to set up a brooder for your little birds. Not many details necessary to describe such a simple set-up, just some larger pictures would be nice.
I can see where using a kiddie pool would be easy to set up when the chicks are small but think they would outgrow that pretty quickly. A cover would be a good idea to keep them from jumping out.