Recently, I joined in on two different charm swaps. The charms had to be handmade. Basically, you could use store bought parts and/or handmade parts...but, you had to create something "original". I made a different set for each group.
These photos are of some of the charms I made for my AAWA online art group. This set was very simple to make. I basically used lanyard clips as my base, and wired up some beads and washers on an eye pin. I wrapped coordinating colored wire around the neck of the lanyard clip.