Cardboard is the ultimate building material for creators and future scientists! Get your eco-conscious kids, aged 9 to 14, engaged in hands-on DIY activities with Cardboard Box Engineering. Author Jonathan Adolph, known for Mason Jar Science, presents step-by-step guides for projects like a working kaleidoscope, a marble roller coaster, a robotic hand, and a wind-powered tractor with cardboard gears. These fun and creative activities not only foster design skills and 3-D thinking but also teach the basics of physics and engineering in a practical way. Perfect for school-going children, these projects can be done with simple household tools and materials.