I think this is a REALLY cute idea!! Maybe you can use some pictures of you and your FH...make save the dates..wedding party gifts...who knows..the possibilities are endless because you can use any picture you like!! :-D
I can also use this idea to make the girls necklaces for my bachelorette party on my own!! This is soo COOL! I found it here:
http://www.notmartha.org/tomake/marblemagnets/
OR
http://www.quietfish.com/notebook/?p=577