Hi Erica! You are going to love the new MagicBands at Walt Disney World. I love being able to open my resort room door, enter the theme parks, and charge items back to my resort account with a simple swipe. Just a word of warning, they will not open your house door once you return home. ( I may or may not have tried.)
The "charms" you are speaking of are called MagicBandits, or MagicSliders. MagicBandits are small decorative pieces that come in packs of three or four and can fit through the holes in your Magic Band. My daughter currently has a Muppet set that is really adorable. Magic Sliders are able to slide up your MagicBands, and come in three packs, or single packs that will slide to the middle of your band and kind of allow it to look like a watch face. You will also be able to purchase a product called the CoverBand, which is just what is says, a decorative cover that will slide over the entire magic band and change it's look.
You will find these fun items in most merchandise sales locations in each park, and the resort hotels. I was recently in
Mouse Gear inside of Epcot and they had a very large selection. Just ask a cast member when you arrive to point you in the direction of this amazing merchandise location.
Have a Magical Day,
~Jen