Tumble Town at the Galleria Mall is starting a Mom's Morning Out program, or they did start it about a week ago. (oops) The program is designed for kids aged 2-5, the kids can bring a packed lunch (the use of a refrigerator is available) and there will be story time, games, bubble time and art. The upcoming dates are October 27th (10:30-12:30pm), November 9th (10:30am-12:30pm) and November 24th (10:30am-12:30pm).
I couldn't find a price for the program anywhere, if you are interested check out their website for more information: http://www.tumbletowns.net/ (call for pricing)
UPDATE: $12 at the door, $10 if you pre-register.