Splash Pad Park

There is also one if Roanoke that is kept very nice and clean.
Cannon Parkway Park
750 Cannon Parkway
Roanoke, TX

It is quite close to Keller... right past Babe's Chicken. They also have a park nearby and a pavillion. Not sure if you can rent it though. The only concern I would have is I am not sure how crowded it gets. Good luck!

FYI- Roanoke also has another splash pad but I have never been to that one. You can check it out on Roanoke's parks and rec page.

There's a splash park in Colleyville at McPherson Park- it's very nice and the closest one to Keller I know of. There's a pavillion with picnic tables, but I'm not sure if you can reserve it.

http://grapevine-colleyville.ourgreatcity.com/Splash+Pad+...

I do love going there with toddlers- all the water fun, without the drowning hazards.

Haltom City has one. It's off Broadway behind the rec center. It's free. There is a playground nearby. I am not totally sure they have a pavilion, but I think they do. We visit this one often in the summer.

Been to the one at McPherson Park, love it, there is a pavilion and it's right next to the splash pad. I've gone by the one on Cannon Drive in Roanoke many times, my dentist's office is around the bend over there and I believe for either one you'd have to contact the parks and rec departments to rent the pavilions. One thing is that the splash pads get very busy especially before lunch. The last time we were at the one in Colleyville it slowed down about a half hour after lunch time.