Our weather being what it is, the time comes for Houston parents to exercise their demons indoors. And Wonderwild is just the place, ­spacious enough to run the little horses and affordable enough to visit as needed. The attractions include a huge kiddie habitrail, various chutes and ladders, non-­mechanized go-­kart tracks, a ropey habitat, assorted toys, foam sundries and a general bounce-­area with an enduring popularity. The staff is friendly; they stay within sight but out of the way, observing the strange, almost self-­governing social systems of children at play.