Oh, Very cool! Just might have to check that out. Always looking for family stuff to do in the area. But, then again... It might trigger some pressure for another trip to the Islands from the better half.
That's always a risk you take. It's free admission. Though, Cal Expo charges $10 for parking. Great music/dancing (three stages), food and lots of booths selling merchandise and arts & crafts. It's a good time.