St. Anthony Falls Hydraulic Laboratory, Kate and I met with Peder Thompson, who develops exhibits for the Science Museum of Minnesota. Peder has done some amazing exhibits on hydraulics, hydrology, and atmospheric phenomenon for SMM, perhaps the best in the world.
Here you can see him with an incredible hydraulics bench display he's working on. That's a fully operational pump he scratch built from acrylic. Peter and I've talked a lot about modeling rivers for museum work.
Here you see a huge interactive wave simulation tank--the floor has many cool interactive exhibits, my scientist wife and I learned a few things in the physics and biology sections! Visit if you can, and plan to spend some time there.