I have been intrigued with the idea of incorporating LEDs into jewelry and have seen a several great examples of this here at instructables. I ordered some sequin LEDs online which I planned to use to this end. However, jewelry making is not something I have a lot of experience with so when I came up with a design it actually seemed more appropriate to use as a hair accessory instead. I had initially planned to use these as hair snaps put the battery holder was a bit too bulky, so I put some ribbon around it and attached it to bobby pins.

Step 1: What You Will Need

Small battery holders
Sequin LEDs, I bought mine at Aniomagic
Conductive thread, I forgot where I bought mine, but you can also buy it at Aniomagic
Small batteries, the smallest I could find were hearing aid batteries
Rhinestones or rhinestone stickers
Krazy glue
Ribbon, thread and needle
Scissors, rotary tool (Dremel)

Step 2: Adding the Light

So I have two battery holders made following this instructable. I made the top side a little flatter so that the LED and rhinestones fit on. I tied a small (2-3cm) piece of conductive thread to each of the leads on the LED. I then glued the sequin LED to the centre top part of the battery holder with Krazy Glue. Try not to get any glue on the thread as it seems to impede conductance*. When the glue is dry, tie the two threads to the appropriate pole of the battery holder and trim the excess thread off. (Put your batteries in and test to make sure the LED lights up before you proceed).

*Actually the hard part was to not get any Krazy Glue on your fingers, those sequin LEDs are really tiny. I found this helpful.

Step 3: Glue the Rhinestones On

I had some sew on rhinestones and some peel and stick ones that I was going to use. I had to remove the metal bit from the sew on ones. The centre rhinestone was to be glued onto the LED so I scraped off the backing so that the light of the LED can shine through it. The rhinestones were attached with Krazy Glue. The teal rhinestones where place around the clear one at the centre.

Step 4: Trim Excess Glue

I used my Dremel to trim off the excess glue from the battery holder to give it a neater look. Before inserting the batteries I put a little paper slip to use as an on/off switch. So to turn on the light remove the slip. Put it back in between the two batteries to turn the light off.

Step 5: Ribbon Ruffle

I used some ribbon to cover the bottom part of the battery holder. I made a little ruffle by sewing a running stitch zig-zagging up and down the length of ribbon (see images above). When you pull on the end of the thread, it gathers the ribbon into a ruffle. Make sure you have a ruffle long enough to fit around the battery holder, then sew the ends together forming a circle.

Step 6: Add Ribbon and Bobby Pin

Glue the ruffle around the battery holder. Then glue the bottom of the battery holder to a bobby pin. If you prefer, you can attach them to hair elastics or hairsticks instead of bobby pins .