What 4real I usually stick to 1 floor because you don't need any more except for aesthetics but pageup/pagedown or the buttons over by the speed options and stuff will do it
Not bothered about toddlers they're well annoying anyway but pools are a pretty major part of The Sims and always have been, plus fountains aren't new you can make all sorts of shaped fountains in Sims 3 ;|||||||

