We are going to Natural History and Science Museums near USC.  We've got a four-year-old (who will turn five during the trip) who is dinosaur crazy.  Each museum is supposed to appeal to all ages.  I sold my oldest (who have had enough of dinosaurs) with the Space Shuttle Endeavor at the Science Museum.
Will probably do a drive by tour of various sites. Talking photos along the way to recreate this 
with my family instead of Randy Newman.
[We need to find a Catholic Church if anybody has recommendations.  Would like a place and history, and English speaking.  Will have a vehicle so can travel.]