Like they used to say on TV, membership has it’s privileges. Both of the Bay Area children’s museums that I have been to are part of a consortium of Children’s Museums that have reciprocal memberships. This means that if you get a one-year membership at Habitot in Berkeley, for example, you can go to the Discovery Museum in Sausalito for a significant discount. Also, if you travel to a place with another children’s museum, you are totally in.
The point, however, is not the membership. The point is that these are destinations with rooms for crawlers. Usually they have mats on the floor or different textures and large scale shapes that babies and young toddlers can put their grubby hands on, in and through. The Discovery Museum Tot Room, for example, has at least four waterbed-type areas for babies.
If you live near one of these places, and buy a membership, consider it a mommy meet market. Go there when you and baby are feeling lonely, let down your hair, and have a juice box or two.