The design and make assignment in the unit suggests solutions such as Moon buggies, lorries and circus vehicles. A good alternative is a to make a helicopter with a moving rotor. I discovered this has a number of advantages:
* It is simpler to make than a wheeled vehicle (the motor doesn't need to power the entire weight of the model).
* It is stationary when tested (although you can challenge your class to make it take off).
* It presents different problems to the usual wheelsaxlechassis set-up, often easier to solve.
* It is likely that by Year 6 children may well have made vehicles before.
* For more able pupils, there are several ways to extend the task by adding extra features.
I followed this basic plan for making model helicopters: * We avoided making a fuselage or body for the helicopter. Instead, we built the models up from the ground using small blocks of wood and thick card.
* We started with a simple circuit with motor and paperclip switch.
* Two problem areas were attaching the motor vertically and fitting the rotor blades. We overcame these by using rubber bands to hold the motor on the side of a stout vertical block of wood, and by using a small wheel or wood block (drilled), glue-gunned to the motor, to fix the blades onto.
* Rotor blades need to be light. We used card, straws or polystyrene.
The children added a tail and skis or wheels. Additional features included a tail rotor, tail fin, acetate bubble canopy, lights and cockpit details.
Andy Seed, primary supply teacher and tutor in primary Damp;T on Leeds
University PGCE course