A basic introduction to the features and functions of drilling machines, examining the forms they have taken from ancient times to today. An activity demonstrates how a drill works.
A basic introduction to the features and functions of cranes, examining the forms they have taken from the Middle Ages to today. An activity demonstrates how a cranes arm works.
A basic introduction to the features and functions of bulldozers, examining the forms they have taken from the 1800s to today. An activity demonstrates how a bulldozers blade works.