We took a side trip to the local science center. We get in free with our membership to another ASTC museum, which is such a great deal. It was a nice "vacation" from our daily trip to the pool and beach.
They had a fun bubble making room, a few little animals (including cockroaches---GROSS!), and some great electricity-type exhibits.
It wasn't as little-kid-friendly as our kid's museum at home, so we only spent about an hour there. Ruby's favorite thing was the coin-drop at the entrance-- she kept running back over there every chance she got!