I was working on my robot with Mr.Ryan and the first thing he said was “The circuit needs a power source”.The power source was batteries.He mentioned that “metal conducts electricity”.We had to screw on the light bulbs.After we did that, we had to make our light switch.Mr.Ryan already had the paper ready so all we had to do was poke the split pin in the paper.Once we put the wires all together, we attached the wire to the end of the split pin.When we put the 2 ends of the split pins together the electricity can travel through it and light up the light bulb.