My husband and I first took our son here when he was about 16 months old. Even at that young age, he enjoyed all this museum has to offer - especially the drums and other "instruments" outside near the playground. We've been back several times and even now (at 6 years old), he still enjoys this large and varied museum. As do I.
The indoor part of the museum has lots of interactive exhibits, centering mainly around space exploration, weather, and other more scientific themes (as the name implies). There is a vast outdoor part to this museum as well with lots of animals (barnyard animals, bears, lemurs, natural wildlife) and a wind section that is also interactive and good for kids of all ages. Even my husband was enjoying some these exhibits. They also have a large insect section, which is also indoors, but separate from the main museum. It houses a very cool butterfly "sanctuary" where you can walk through a sort of jungle/greenhouse type atmosphere with butterflies all around.
There is also a decent restaurant on the grounds - definitely not something Zagat's would recommend, but it is just fine for a quick lunch or snack.
Overall, I would highly recommend this place - and I would suggest going on a nice day so you can enjoy the outdoor sections - and when you have a full day to enjoy it because it's worth the $20 admission, but only if you plan to spend most of your day there.
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