Last week Tom Vales came to talk our class about electricity. When I heard that he coming I was not too excited about a guy coming and talking about electricity. But I was completely wrong. When he came started to talk about Nikola Tesla vs. Thomas Edison. That was not to interesting but it was interesting on how Tesla did so much work with just him and a lab assistant and how Edison did the same amount of work but with so much more lab assistants. Another interesting thing was thanks to tesla we have alternating currents. The most interesting part came when he took his toys. His toys consisted of a plastic bucket wrapped in copper, some light bulbs, and something else I don’t remember the name. When he turned on his black box nothing happened. When he started to put the light bulb closer it lit up. When he put his hand in middle of the bulb the one side closer to the black box stayed lit but the other side did not. After he did the same thing but with a multi colored bulb. Since Mr. Vales had an appointment in a half an hour he had hurry along the presentation but the things he showed us were really fascinating and I hoped he had stayed even more just to show us how the black box which I now think is an inverter. Overall having Mr. Vales come and present was a great time and very fascinating. I hope he does come back in a future class since his presentation was very interesting.