This is a link to the Smithsonians’ Museum Day. Saturday 9/28. It’ll give you and a guest FREE admission to a museum you choose. Its not only the Smithsonian Museum in Washington D.C.. There are links to museums all over the country. You can search by subject or by location.
In Houston, you can choose among the Buffalo Soldiers National Museum, Dunham Bible Museum, Holocaust Museum Houston, Houston Center for Contemporary Craft, Lawndale Art Center, and a favorite of mine in Galveston the Ocean Star Offshore Drilling Rig and Museum. There is the tall ship Elissa right there too, if you do happen to hit the Ocean Star Museum, you can make it a maritime day and enjoy lunch on the waterfront watching the cruise ships dock.