What you will need:Velcro
Optional: Buttons, ribbons, sequins
Tip: for doing this project with littler kids, you can buy blunt end needles that won't poke fingers but will still go through felt or wool fiber fabric. The needle eyes are also larger to make threading easier.
Fifth: just cut a small square of each side of your velcro (fuzzy side and rough side) that is big enough to be secure, but will fit inside the parameter of the bracelet. Be sure to pull them apart so you have your pieces of velcro separate. It doesn't matter which side of your bracelet you sew fussy piece or the rough piece of velcro onto. So you will sew on one piece of velcro to the end of the bracelet on the side of your design. Then you will sew on the other side of you bracelet (the side that will be on your skin), just flip it over sew the other piece of velcro on the opposite end and opposite side of your bracelet.
(In my photo here, you can see the velcro on one side and then the outline from where I sewed on the other piece on the other side of the bracelet.)