What's the cost for adult and 11 yr old. What ages are the museum geared for?

Same price for everyone. Or you can buy a membership, as expected. I think under 1 yr is free. We took my 5 yr old recently and years ago. He loved it both times. As I stated in my review, you can easily burn 3 hours here...

All ages pay $14.50, toddler, child, teenage, adult, and senior. All ages will enjoy the amenities

Hello the cost is $14.50 for everybody and for the ages there's a little bit for all ages.