How slow cooking with a DIY solar cooker brought my mind back to my childhood? I have no idea.
But did you also have such fun as a child with a shoelace and a magnifying glass? It was fantastic to try to light the fire by burning the lace with the sun shining through the magnifying glass.
I never thought about that fun again until I started researching solar cookers. Not that we need a magnifying glass for a solar cooker, but the sun is definitely needed.