 Okay, for this first activity, I have a pi-10, some water, two nails, and this is just a magnet with a north end and a floater. So let me show you what I'm going to do. First, I'm going to fill up the water in the thing, in the pi-10. And then I can put this on there, like that. Let me stop it from moving. Okay, now I'm going to take the magnet, and you could do this as a demo or students could do this as an activity. And I'm going to rub this with the north end from the head to the tip, just like this, three times. One, two, three. And then I'm going to do the exact same thing to this nail. One, two. Now I'm going to put the magnet off the side. I'm going to put the nail on the little floater so it can spin freely by the stop. Okay, so now I'm going to take, let me move the camera a little bit. So now I'm going to take the tip to the tip and see what happens. Now I'm going to take the tip to the head. Now I'm going to turn this one around. Let's do the head to the tip. Now I'll do the head to the head.