I absolutely love Margot Potter, The Impatient Crafter. She's very cool, and she likes Mod Podge. Her projects range from a little bit of everything to a lot bit of . . . everything! Margot made this necklace out of a lot of supplies you may already have laying around (if not, they are relatively inexpensive) – one of the best is that she used images from a magazine. You could use photocopies of your own pictures.
So the necklace, which she calls “All Eyes on You,” was sealed with Mod Podge. Read the supply list and instructions here.