Today I learned how to make a light bulb light up it was so cool I learned about a load and open circuit and closed circuit it works like this a load is what you hook up to the battery and a open circuit is a circuit that is not working and a closed circuit is a circuit that works. I also learned that an electric current can flow through a wire. Also I learned that a switch can turn a circuit on and off and I also learned about a conductor and insulator a conductor lets electric current flow through it and a insulator is something that electric current cannot flow through.