We visited the Liberty Bell museum with our home school co-op for a field trip. This museum did a great job of entertaining all of the age ranges of our kids from toddlers all the way up to high schoolers. There was a short movie to watch, they did a dress up with uniforms, there were tons of interesting displays, and a cute little gift shop area where you could buy things like tin whistles. I don't advise hanging around outside if you can help it, there's a lot of homeless population around. The museum of course has nothing to do with that but it's just a heads up if you're taking your young kids and you want to play in the green space nearby. Be sure to call ahead of time because the hours are very limited, and they might only be opening for private tours or groups. We had no problem scheduling for our group but we did it well in advance.