My son who is 7 now knows that I have guns and I've not had any problems with him knowing. He knows that they're Daddy's guns and he's not to touch them, but I still keep them locked up when he's here. I let him hold my Mosin-Nagant M44 a couple weeks ago and he thought that was pretty cool though. As for his friends and his friends families, they don't know yet as fas as I know.