I have a pic of my son on one side and a pic of my daughter on the other side (this keychain kinda resembles the way a locket is), and I hang it on my keys!
I was wondering the same thing. I just got mine yesterday at my local outlet. I have 4 kids but think I might put a picture of my little chihuahua in mine. The kids are older so I don't think they will care. Haha
The locket is going to have my husband and dog. The pink one is going to have my family in it. I haven't got pictures in it cause I don't have ones that small so i may have to scan it and resize them.