|When I was around 8 years old, I had my first encounter with the principles of the dynamo. For reasons I cannot remember, I had decided that the lights designed to illuminate my toy post office needed to be directly connected to a motor removed from my toy digger. Completely by accident, I discovered that if I manually turned the motor, and with no batteries involved, the lights would come on. Startled by this incredible discovery, and in the firm believe that I was on the brink of an invention that would solve the world's energy problems, I assembled a trolley where the wheels turned the motor, so as I pushed it along the lights came on. Promoting it to my family as a device that made electricity for free, I was disappointed to be told that the energy coming from my arm to make it move was not free, I was converting kinetic energy into electricity, and not creating it from nothing. I didn't wholly believe their theory initially, but after months of contemplation and calculation, I was eventually forced to agree.