Leo is a Stone Age genius. His pet cat, Pallas, is not. Together they explore the fascinating world of science and come up with some truly brilliant inventions! Leo teaches his cat, Pallas, all about Buildings and Structures by applying his knowledge of science to their Stone Age world. Leo's inventive projects help explain the science concepts at work in construction, including ramps, forces and loads, stress, and more. Book jacket.
Buildings and Structures
Crabtree Publishing Company