Occasionally, we will venture up even further north than Potsdam to visit our friendly Canadian neighbors. Up in Ottawa, they have a couple of fun museums that Otis gets more into every time he visits. On our most recent trip to the Canadian Museum of Nature (where Otis was terrorized by a giant, scary octopus), we found an exhibit with a bunch of buttons:
You could push (and hold) the buttons to play (and keep playing) different above- and underwater sea sounds. Otis and I improvised a maritime sound collage.