Children's Museum Houston
Consistently ranked among the best childrens museums in the country and it earns it. Kidtropolis is a whole kid-run city with a bank, a vet clinic and a grocery store where children take jobs and spend their own currency. FlowWorks is a giant water play zone, and the Invention Convention lets kids build and test contraptions with real materials. There is a separate Tot Spot for the under-threes. Thursday evenings are free family nights and they get very busy, so weigh crowds against cost.