You *will* learn a lot about shells and will be able to identify what you find on the beach after visiting the museum.
Our family of four (Mom, Dad, and two elementary school age kids) visited the shell museum on a very hot afternoon. We started off with the 30 minute movie, which was made by a local resident for her grandchildren. It's of excellent quality, but it starts slowly with lots of "science" details and probably not the most interesting ones at that. Our children managed to sit still for about 15 minutes and then we slipped out to the gallery.
The gallery is small, but nice. A docent gave the kids a sheet of paper with pictures of various shells and told them that if they could find them all, they'd get a small prize, which turned out to be a shell. That's all they needed to hear and we were off! There are shells from all over the world and there are also a few displays about how shells have been used throughout history. I love museums and like to read everything in the displays, but our kids (and Hubby, too) were a bit impatient so I didn't get to browse as long as I would've liked to.
The gift shop is small and not especially child-proof. Probably best to skip it if you're worried about your child picking something up and accidentally breaking it.
There was only one drawback. The children's alcove includes a small display, about the size of a sandbox, that is filled with water and shells. However, it's a "Please Don't Touch" exhibit. Why put something so tempting within a child's reach?
Plan on spending about 30 to 45 minutes in the gallery, depending on your interest level.
The museum does not accept credit cards for the admission fee, by the way.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.