Young Andy watches Red and his building crew construct a new house next door, getting scrap material and advice for his own tree house in the process. The slight story serves as a backdrop for an elementary description of how a house is built. Unfortunately, the lack of attention to detail in the illustrations leads to several inconsistencies: the back wall is framed five feet wider than the front; the width of the garage opening varies by four or five feet from picture to picture; a front window suddenly stretches by two feet from the time it's framed until it's installed. Red doesn't seem to trust his material or advice; when Andy invites Red into his tree house, Red says, ""I might break the floorboards."" Since Red is apparently putting roof trusses on five-foot centers, his caution is understandable. Splashily attractive paintings of the New Hampshire countryside and such large equipment as concrete mixers and bulldozers don't compensate for the trite storyline and sloppy presentation of information.