We recently purchased a year membership to our local Children's Museum. It's been rated #1 in the country (world?) for as long as I can remember. They had it decorated for Christmas time, but Camden had so much fun in the Playscape.
There was a big music room where kids can play with egg shakers, drums, and other instruments. I grew up with music (flute/piccolo here) and want Camden to be able to do the same. When I was in school music wasn't an elective; it was an expected part of the curriculum. I feel that it still should be although many superintendent's don't agree. Whether it's offered in school or not, he will be participating in lessons either way. :)
His favorite part of the museum (besides the food) was the messiest part, the water play area. There was flowing water, scoops, spoons, plastic sharks, etc. He loved it. There were aprons, but they were all really wet and by the time I found a dry one, his clothes were soaked anyways.
Overall we absolutely had a great time! I love taking him places where we aren't having to constantly watch what he touches or plays with. I like the fact that he can play with anything and everything he can reach.
I think it really helps him to be able to test his own limits and is great sensory stimulation. We will definitely be getting our money's worth out of this membership!