A guide to creating different types of spherical models, with instructions for making polyhedrons, sphere tilings, and dome structures and an overview of the mathematical principles involved in their creation.
Briefly explains how to choose the rolling stock for a model railway, how to make buildings and scenery, and how to put it all together in a permanent or portable layout.
Presents illustrated, step-by-step instructions for constructing thirty-one paper airplanes, including fantasy flyers, reproductions of actual planes, competition craft, experimental models, and anti-aircraft devices.
After visiting the Hall of Flight at the Bearsonian Institution, the Bear cubs decide to invent their own airplanes. Incl. information about history of flight and instructions making balloon-powered ar.
Discusses the history, principles, and practical aspects of rocketry; presents experiments that illustrate rocket principles; and explains how to participate in model rocketry.