Solar cooking is fun and interesting; it teaches you about solar radiation and how it can vary in different weather patterns.
You can build a simple oven, or you can get fancy and make a super-duper one. You can even design and build an automatic tracker, which follows the sun over the course of the day automatically, so that you don’t have to do it manually. You can make an automatic tracker in several different ways, which all involve interesting physics.
Chapter 24: Ten or So Best Do-It-Yourself Projects
You can make a solar oven any size you want; Chapter 9 has details for building a basic one and a sturdier one. I have a small solar oven next to my barbecue, and I can cook corn on the cob while flipping the ribs. For some reason, the corn has a unique, very pure flavor.