From the best-selling author of Mason Jar Science (111,000 copies in print), these projects are accessible, fun, functional, and educationalThe ideal engineering material for kids, cardboard is sturdier than paper, easier to cut than wood, inexpensive, easy to source, and eco-friendlyA great tool for STEAM education and science fair projects, emphasizing hands-on learning of engineering, physics, animatronics, and problem-solving