You will need:
Glue Stick (does not need to be fancy)
Bangle Form (Use a bangle you already have to find something the same size. Mine is a coffee mug)
Decoupage medium (or liquid glue mixed with a bit of water)
Rotary Cutter (you can use scissors too, if you want)
Board (to protect surface from blades
*I got the idea for this from this
instructable. I added a bit to make it more suitable for a larger size.