S.C.
Hi K.,
You didn't mention where you live, so I don't know if this will help or not. You might consider a sprayground. I think there are several around Dallas, but the one I know is near me in Lake Highlands. It's located at the Lake Highlands North Recreation Center on Church Road, not too far from Skillman Road.
http://www.lhjwl.org/PDFfiles/SpraygroundPlans.pdf
It's free. There are also playground equipment and picnic tables.
Good luck finding something.