I'm sure you're aware of this but....

The DuPage Children's Museum (in Naperville, IL) has an extensive water play 
area.   They installed a concrete floor -- stamped and stained to simulate 
stone as I recall -- and then added a bit of "anti-slip" texture into the mix.   
Then ontop of that floor, and under the actual water tables, the have layed 
interlocking plastic dry-deck tiles that let the water drip and drain through.

See a picture here.... 
http://www.dupagechildrensmuseum.org/images/VirtualTourPhotos/virtual_tour21.j
pg

I'm sure they'd be happy to talk about their experiances if you want to give 
them a call.


- David -
David Lewis, Curator
Aurora Regional Fire Museum
www.AuroraRegionalFireMuseum.org

(630) 892-1572 Museum
(630) 258-5878 Direct

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