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alternative energy model project ideas?

for my science class, we’re doing a project for alternative energy sources. and we are required to make a non-working model for one of these sources of energy: solar, biomass, hydro power, geothermal, wind, and hydrogen.
we have to make a 3-D model/display of the topic (energy source) we choose. but it doesn’t have to work.
my question is, if anyone had any ideas for this project?
like what could i make a model of?
if there are any websites or anything please list them!
this would really help!
(easy ten points!) thanks

You can make your project out of recycled materials like soda bottles. There is a wind turbine project you can make with all recycled material, also a solar oven. Since it is only a model, it should be a quick easy build.

Good Luck!!

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