Me neither. My son has a patch that was certified by NASA to have flown into space on a shuttle mission.
If they want it back, they wont need to go far. He works there.
If your son has a Silver Snoopy, that is a lifetime accomplishment. Good on him. That flew on a shuttle mission and was handed to him by a shuttle astronaut. It is his to do with as he wishes, but it is a family heirloom.