Videos about solar cooking
Here is a Youtube-Videos showing the SK14 parabolic-cooker in action:
This one shows how to cook rice, fry vegetables and cook water for a meal. The dishes are cooke one after another and stored in an isolated box (so called hay-box) to be hot and ready at the same time. Note that the rice-cooking is continued in the hay-box.
http://www.youtube.com/watch?v=jnwzJE1MwVw
This Video demonstrates the concentration of light by a parabola: