Periodically I share resources that you may like to add to your library. This is one I purchased to use with one of our summer fundraisers. Anderson, Maxine. Amazing Leonardo da Vinci Inventions You Can Build Yourself. White River Junction, VT: Nomad Press, 2006. From the back cover Amazing Leonardo da Vinci Inventions You Can… More Amazing Leonardo da Vinci Inventions You Can Build Yourself