Yes, it's true - an indoor skate park. I guess it's so hot in Texas for much of the year that kids won't do it outdoors.
Another reason for the indoor variety is profit. Somebody is making a lot of money off those kids. (I didn't even check the price of admission.) And there's also the adjacent skating equipment shop. Suburbanites spend more of their parents' hard-earned cash there.
By the way, this place is at the Grapevine Mills Mall. Get your skateboard on.