The Fort on Fourth Street

When a young child decides to build a backyard fort, Grandpa joins in to help, enlisting the assistance of six simple machines: lever, pulley, inclined plane, wheel and axle, screw, and wedge. Told in a cumulative rhyme style reminiscent of The House That Jack Built, the story follows the building process from start to finish. The book also reveals a special surprise behind the fort's construction, making it both educational and engaging for young listeners.