If you don't know their jewelry, then check the wrist of any random high school or college girl and you'll probably see 1 to 10 of Alex and Ani's charm bangles stacked and layered.
There are literally hundreds of charms - collegiate, sorority, football, and your basics, like initials, flowers, etc.. Something for everyone. We particularly liked the Red Sox ones.
They make perfect little girl birthday gifts or stocking stuffers! ~ LB
All images from Lisa Bida.