Ask the children to cut out or identify pictures of wheels and axles in magazines. They will likely point out many pictures of vehicles, bicycles and other methods of transportation. Suggest they look for less common examples as well, such as wagons, wheelbarrows, windmills, doorknobs and even manual pencil sharpeners. If a pupil points out an incorrect item, explain to him exactly why it is not classified as a wheel and axle.
Divide the pupils into groups. Give each group a set of building blocks that includes simple wheels and axles. Instruct the children to build a vehicle that can carry a designated item, such as a marshmallow, from one side of a table to the other. Visit each group, providing plenty of guidance and advice. This fun activity should simply help the children develop an understanding of basic wheel and axle construction.
Explain to your pupils that a doorknob is a common example of a wheel and axle. Without the knob, the inner rod is nearly impossible to turn. Temporarily remove the knob from the outside of a closet door using a screwdriver. Allow each child, one at a time, to attempt to open the door to the closet by only twisting the knob. The children will likely enjoy the silliness of this activity while learning the significance of wheels and axles in everyday situations.
Assign a wheel and axle homework assignment. The children should ask their parents or guardians to discuss and list ways wheels and axles are important in their everyday lives. For example, their parents likely utilize these simple machines when driving vehicles, operating machinery, reading their watches, listening to record players or even using rolling pins to bake. Allow the children to discuss their findings when they return to class.