My vocation was in Human Powered Vehicle design. I won the Practical Vehicle prize with a radical chassis that integrated the springs and suspension with the composite frame. I had many eager customers, but wound up learning hard lessons about business and management, which I hope to write up. Now that I'm officially retired, I might be able to afford another prototype. In my "spare" time, I do big, family-friendly displays for many demonstrations. My big Earth Ball, orbited by "paper dolls" has been a popular visual feature for decades, and I've got a Big Dove that is easy to store, haul, and set up, and experience with backpack puppets.