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Learners use engineering design principles to construct and test a fully solar-powered car. Solar car kits usually include a photovoltaic cell and motor; some include a chassis as well.

Learners design their own experiment to explore the permeability of different materials such as soil, sand, gravel, and marbles.

Learners design and create musical instruments from common objects; their challenge is to create an instrument that can make three different tones.