The other day, I saw some nifty directions for making a chicken water heater out of a cookie tin and a light kit . Since my husband, Greg, is an electrical engineer, he likes me to ask him before I begin projects like that. So, I asked. He said, “Let me think about it.”

A short while later, he was teaching me about resistors, Ohm’s Law, and how to calculate how much power a 60 watt light bulb uses. He showed me a website, mouser.com, that sells electronic parts, this is where we ordered our resistors. Then, we made a trip to Radioshack for heat shrink tubing.