I'm going to assume that you've never worked with LEDs before. If you have, just skip this short intro.

Take a look at your LED. You should see that one of the prongs is longer than the other. This longer stem, is the POSITIVE lead. The shorter one is the negative. That's basically all you need to know for this project.

Now let's test your LED. Hopefully, you purchased the pack I recommended, so you'll have plenty of choices here. Pick which color you'd like to try, then take your cr2032 battery and stick it between the two prongs. The smooth side of the battery is positive, so make sure that side is touching the longer stem. The LED should light up. (IMG 1)

Now to check what your fairy is gonna look like illuminated, stick the LED into the hole we made earlier and do the same thing we just did. (IMG 2) If you're wondering how I got pink, the LED I used is actually red, but looks pink when shining through the foam) If you're content with the color choice, let's move on to the more complicated part of the project.

Take your LED, and attach a B-Connector to each prong. If you look inside the B-Connector, there is a tighter side and a more open side. We want the tighter side to go onto the LED prongs. You may have to open it up a little by squeezing the side with wire cutters or pliers. Use something to mark which side is positive on the connector, so you don't get confused later. Now using wire cutters, or pliers, crimp down on the b-connector until it is firmly squeezed onto the leads. Give each a slight tug to test their strength. If they come loose easy, retry until they are firm. Now you should have something like this.(IMG 3)

Take your drill, or whatever you used to make the hole for the LED earlier and make the hole wider. We want the LED and the B-connectors to sit all the way into the ball, so make the hole just big enough for that, but no bigger. Afterwards it should look like this.(IMG 4) Now take the LED back out for now and set it to the side.

Now, we need to cut some wire. If you don’t have any plain copper wire (I didn’t) you’ll need to improvise. My first build, I used two long twist ties and used wire strippers to remove the plastic from the wire underneath. This worked surprisingly well. My next build, I used some 22 Gauge wire, and used strippers to remove the plastic from the copper underneath. The thin copper wire is far less noticeable than it is with the plastic still on it. The wire will be both supporting the fairy, and running power to the LED.

To determine how long the wire should be, hold your fairy up to the bottle and decide where you want it to “sit” in the bottle. Once you’ve decided, imagine that the wire is running from the top of the ball to the switch in the cork. This is how long of a wire you need. Cut about an extra inch or 2 to give you some breathing room for error.

Now let’s connect the wire to the LED. Stick each wire into one of the b-connectors. Then, same as before crimp the connectors until they are tight on the wire. (IMG 5)

Now let’s test that the connection is still strong. Take your battery, and the same as with the LED before, hold the battery between the two wires to send power down the wire to the LED. Hopefully you marked which side was positive earlier, making this even easier. If you didn’t, no big deal, just turn the battery around if it doesn’t work at first. Make sure that the two wires running from the LED are not touching at any point, this could also cause it to not work. If for some reason you can’t get it to light, then your connection must not be solid enough. Just open the connector back up with some pliers or wire cutters, and redo it until the connection is strong. (IMG 6)

OPTIONAL : Before gluing the LED in place, I took a tiny drill bit and drilled a bunch of tiny holes throughout the ball into the center. What this does is help to disperse the light a little more evenly. This isn’t necessary, and doesn’t make a HUGE difference, but does make a cool little effect.

Once you have a solid connection, stick the LED into the hole until the connectors are flush with the ball. Now, hot glue this to the ball to make it more solid. This isn’t necessary, but if you don’t the LED could fall out at some point or come loose.

Now let’s make a spot for the battery. I took my utility blade, and cut a small slit and then pushed the battery inside. (I taped the bottom of the lid earlier in case you’re wondering, just preference.) Put the positive side closest to the switch. Run a small piece of wire from the positive side of the battery, to the the prong on the switch closest to it. (IMG 7)

Now onto wiring the switch. First, a quick rundown on how the switch works. All a switch basically is, is a “link” in the chain. When the switch is “ON”, the link is complete. When the switch is “OFF” the link is broken and no electricity can get through. The positive wire from the LED is going to run to one prong of the switch, and the other prong of the switch is going to run to the positive side of the battery. When the switch is switched “ON” the circuit is complete and the positive juice goes through the switch uninterrupted and into the LED. When the switch is “OFF” the circuit is broken, and the charge does not make it to the LED. This is a quick diagram of how the switch will be wired. (IMG 8)

So we need to run a wire from the positive end of the LED (hopefully you marked it) to the other unused prong of the switch. Now take the negative wire from the LED and run it to the negative side of the battery. I simply stuck the wire into the foam and pried it against the battery. This is by far the hardest part of the project, so don’t get discouraged if it takes you a few tries. Once you’re done you should have something like this. (IMG 9)

Test the switch and connection by hitting the switch a few times. If all is good, then all that’s left is to put the top and fairy in the jar. Turn the wings sidewise as their going in. Move the lid around until you find a good position for the fairy.