Brief (5-6th classes):

• Can we light up more than one LED light from provided wind turbine?

• Define a fair test (lung capacity vs hair dryer is an example of an unfair test).

• Use geometry to find the centre of a circle and the centre of gravity of a disc.

• Determine results. No design managed to light 2 lights, including the teacher's. 15 models were designed and built; some were not completed for testing.

• Reflection: in future, more time should be allowed for testing.