Ohhh.. I see!
Well... I don't know if you know how to sew at all... but you could make a little bag for his tags. Just a tiny simple bag with a draw string to keep it on.
I used to make purses when I was little on my mom's sewing machine like this.
Cut the material out with the bottom of the bag on the fold of the material. Sew up the 2 open sides and sew in a little casing for the draw string. Easier said than done I know, I just figured if you or your mom knew how to sew. You could make these little bags until Nebo's sweet little sister can keep her teeth off of the $8 tag bags!