This project is particularly inspiring to me because it reminds me of the immense fun I had building things with moveable parts out of Legos and K’NEX (which wasn’t always easy). Of course, at the time, I was too young to understand (or want to explore) the science behind it. I also admire their tremendous efforts in putting together a comprehensive curriculum to accompany the wind turbine kits.
Prusa 3D printer:
Really nice shell 3D printer, high res shell objects with very thin walls made by Prusa: http://www.makergear.com/products/3d-printers
The man running the stall had lost his voice so didn’t get too much information out of him but he had some examples that were pretty amazing.