Where can kids go nuts?

I got a 10 hour layover in Houston this summer with some wired up kids (5 & 9). From 9am to 7pm. Where’s the funnest place to take them to burn energy so they’ll sleep happily on the next flight? Lagoonfest looked cool but has bad ratings. Anything with lots of waiting in lines or paying attention is probably not it. Just want to let them run wild for a few hours. Suggestions?