Hi N.L. --
I want you to know that reading your note made me smile.
Congratulations!!
You are doing an absolutely fantastic job, imo.
Noting that you're in Orange County, you might like
to check in at the Griffith Park Observatory website.
Your child is probably old enough
to go to one of the Planetarium shows.
Some of their shows are specifically geared toward younger children.
But I think he'd probably be able
to enjoy some of the other shows as well.
The museum itself has many exhibits
that demonstrate and explain our solar system and related topics.
When traffic is light (ha ha), you can probably get there
in about 90-120 minutes. There is (relatively) easy parking
near the front entrance.
Keep on keepin' on!!
S.