A crash course in changing the world.
In the beginning I remember a girl I saw when I was a child. She was cooking eggs on a stone and put some alu foil on it. So I tried to make my coffee with a construction with alu foil. But unfortunally I failed. Maybe my construction was bad, maybe the the sun in Germany is not powerful enough.
Today I was having a barbecue and was searching for a way to remain my foot warm after grilling it and was remembering my alu foil construction. It works well and so I invented a case that warms your foot during a barbecue.