I ordered these from Rainbow Resource. You can probably get them at Michaels or Enasco...
We used one sheet of Shrinky Dink paper cut into six squares. The girls made their designs with Crayola colored pencils and cut them out. A hole punch was used to make the opening for the string before placing them into the oven. Make sure that your hole is not to close to the edge like the bumble bee...that one broke.
Clear beads from Michaels were used and a clear nylon string. Those little boxes of beads last forever.