How do you keep a few sodas in your classroom cool? Well, if you are teacher [Ethan Hunt], you have your students design and build a solid-state mini refrigerator that can beat his prototype fridge.

Add Yahoo as a preferred source to see more of our stories on Google. Mini fridge on shelf. Let's be real: if you're buying an appliance, it's best to do it over Black Friday and Cyber Monday. This ...