Living locally, the museum is a great place to go with my family during the winter when cabin fever really sets in. They offer a variety of classes for birth up to school age, camps, home school programs, family programs and special events themed around kid's interests and holidays. A family membership easily pays for itself.
If you are visiting from another area, take advantage of the museum's beach passes and make a day of it. The museum itself is small but seems to be improving with the new leadership. They have added a large tree house and zipline outside and are supposed to be adding a new exhibit in their town area inside. They have begun rotating the science exhibit more frequently and the class offering and drop in activities have become more diverse. We have been happy with our time at the museum and would recommend giving it a try.
I was very let down when I visited this museum with my family. We took my 3 year old daughter there. First off, it was very expensive to get in and wasn't at all worth the price. Once we got inside we were even more let down. The exhibits are something that we could make at home. For example one exhibit was plastic drinking cups stacked on top of each other.. terrible.. We were in and out of there in 30 minutes and my 3 year old and myself were bored. we will never return.
This is a VERY small museum compared to others in New England, but it can still be a ton of fun. Geared toward younger children, the museum regularly changes out exhibits. There is a separate play area for the under-3 set. Our family absolutely loves the classes that they offer, for ages 6 months and up. The educators are fantastic. The membership is affordable and you can purchase one that reciprocates with many other museums. There is a newly-renovated outdoor play area with a tree house and activity stations.