Cathy C.
Yelp
I've been to my fair share of children's museums now in multiple states. As a child... honestly anywhere you take them they'll have a good time. For the price of admission (a little over $60 I believe for two adults and one toddler), it's a little expensive for what it is. I think I read that it's a non profit, so just something to keep in mind especially if you compare the museums in Balboa Park to this one. Also, I'm assuming a big part of the cost is that it's located in the downtown.
Huge space with three floors, but none of the exhibits were that amazing imo. One portion of it was just walking through a maze-like big room with poems? Written in the walls, nothing else. I suppose I don't know the history of this place, but as a child, it wasn't fun (for the adult it wasn't that fun either). There's a theater area, with some cloths for the children to wear. Very theatre-esque, but since it's for children, I would expect more fun options (like Halloween costumes). Sure, it may not quite fit the theme, but you're catering to kids, more specifically the younger ones.
The outdoor area with clay was a big hit for children of all ages.
One of the biggest downsides is there's no AC inside, so they have a lot of big fans all over. For a museum to be in such a hot location like SD, I would expect more air circulation. We came right when they opened, but already at 12pm a LOT of families were there... make it extra stuffy.