We haven't... but we're big fans of the
Children's Museum of NH in Dover. We buy an annual membership to one of the recipocating museums, like the McAliffe-Shephard Planetarium in Concord or the SEE Science Museum in Manchester. They're part of a reciprocal program with hundreds of other museums in the world - you can get in at the other museums for free or a small fee - it's a wonderful program and helps to save money, in the long run.
(We've figured that 2 trips for our family of 4 to the planetarium in a year is equal to the cost of an annual membership - so that's a big savings for us with all the other day-trips we do.)
There's
one review on YELP for the Meredith CM.