Brief text and photographs examine a wide range of machines used on the construction site, including excavators, drills, dump trucks, bulldozers, and wrecking balls.

Why do we have machines on a construction site? -- Which machines help to knock things down? -- How do machines get the ground ready for building? -- Which machines carry rocks, soil, and sand around? -- How useful is a digger machine? -- Can diggers do other jobs? -- What is a backhoe loader? -- Which machines are used to reach high places? -- What does this machine do?