The tour was very informative. I learned a lot I did not know about the Mormon contribution to the original San Diego and how the Mormon men joined the US Army to defend the nation in that area.
Not to give it away, but the tour was interactive and at the end you can pan for gold or learn how they made bricks. You can also get a free photo with your family.
The admission is free and I think your family would love it - especially if you're going to go to the downtown area anyway.