Okay, in this activity I have, this is a Duracell C battery. I have two copper wires. And then I have a light bulb. And this one says 2.47 volts on it. And so in this activity, as either a demo or an activity, students try different configurations to light the bulb. So here's one that will work. I can take the light bulb like that. It's kind of hard to do with one hand. And then touch this to the tip. Here's another one that will work. I can put the tip right there. This is kind of hard with one hand. So the tip is touching the battery and then now the wire touches the side. Here's one that will not work. I touch the tip of the bulb to the wire. And then I touch the two ends right there. Here's another one. I can use two wires. Actually this is tricky. I can use two wires like that. Here's one that will work. How about that? And touch one to the side and one to the tip. I told you it was tricky. This is why people are working groups. Okay, here we go. Okay.