Book excerpt: Edward Thatcher's 1919 book, "Making Tin Can Toys," provides instructions on how to construct toy trucks, boats, trains, and windmills, as well as trays, candlesticks, and biscuit cutters, all out of used tin cans. Thatcher, an instructor of Decorative Metal Working at Columbia University's Teachers College in New York City, made clever and durable creations using simple tools and an abundant material. His design methods were trial-tested by both10-12 year olds and wounded World War I soldiers. The book includes over 100 helpful diagrams and black-and-white photographs.