I love hermann park. And second Evelyn's park. The tod spot in the children's museum (free on Thursday evenings) Some libraries have play area's
I really like the littles area upstairs at the children's museum! Soft play and lots of options
I second Memorial Park and children’s museum! Also Levy park had lots of events, and various public libraries have story hours for little ones every week! We are trying to go in a couple weeks.
Memorial Park is nice Evelyn's park conservatory Donavan park in the heights Houston zoo/the museums are good sensory input