Andrew Henry Thatcher's enthusiasm for building-a helicopter in the kitchen, a merry-go-round hitched to a sewing machine-created problems, so one day Andrew Henry moved to a meadow. There he was joined by eight other children each with a special interest no one seemed to appreciate. With his friend, Andrew Henry solved his problem.
Presents a description of how construction toys work, in simple text with illustrations, with explanations of the basic principles, materials, and designs, including how building bricks stay together, what nuts and bolts do, and what a pulley is.
Describes the construction of the early houses and the later development of structural steel buildings including today's latest developments in poured concrete.