This would be a fun day trip from the Antelope Valley.  When we lived in San Diego all the museums in Balboa Park were free on different weeks.  In about a month, you visit them all!  ~ Heather

For for this month please take note of a special event called Museum Day Live! on March 12 when seven area museums will offer free admission as part of a nationally coordinated effort by Smithsonianmagazine.

Source: Here’s a Cheat Sheet of Free Museum Days in L.A. For March (2016)