"Google" Science fair? Were the admission tickets tax free then?

Ann, A vary simple but original thought on your part for a device that will likely be commonplace in a decade. I implore you to hold on to royalty rights. Money does not buy happiness but it allows you freedom to pursue happiness where you wish to look for it.

That's an intelligent cutie, stay in Canada if you want your green tech flash light to make it to production.

Amazing..Looking forward to buying one..Why didn't I think of that

This concept is really brilliant. And - wow! - what a gifted kid; if her science career flops (unlikely) there's always public relations, acting or modeling.

Thermoelectric modules have been around for many years. They will produce current when hot and cold are applied, but as a reliable source of electricity - it falls short. I will give her an A for cleverness!

That is just so cool.

Yup, if not a scientist or engineer, she can have a "modeling" career. The machining of the aluminum, its flat spot, the perfect fit between the bezel and inner/outer tubes, the perfect clearances, all worked in concert to create a model that would be expected from a Catholic School student without a machine shop as would be found in a vocational school.
Part of being a good scientist is disclosure of assistance and providing references for your sources. I just refuse to believe others did not contribute significantly to the modeling and she merely had an idea. I'd also note that the Chinese are scrambling to understand this, as I write this, on lighting forums, so it'll likely be on the shelves by xmas.

If there is one thing I know about females, it is that they are rarely good sources of heat. "I'm cold!" "Put a blankie on me!" "You obviously aren't using your jacket, can I have it?" As warm as the room is claimed to be, I'd almost believe that her hand was the cold side of the thermoelectric junction.
In any case, this could be a pretty neat product for late-night wilderness rescue teams but even the warmest of hands probably won't make it work in warmer climates. If she has an opportunity to take it to market, I imagine it might sell to survivalists living in Alaska, Canada, Scandinavia, and Russia...probably nowhere else, especially if Chinese companies are developing similar, if shoddy, products that will almost certainly sell for less.

Add a capacitor so you can save up some charge so you have both the stored power and generated power to get a brighter light.