I have a project to do in school about alternative energy. We have to build a model of some sort of energy source. I picked hydrogen fuel car. How should i build one, get a kit, start from scratch, if i start from scratch how can i build it.

(may be broke/outdated!)
I have a project to do in school about alternative energy. We have to build a model of some sort of energy source. I picked hydrogen fuel car. How should i build one, get a kit, start from scratch, if i start from scratch how can i build it.