1 year old ring bearer

I didn't find any sort of clothing attachment, but what about a ring pillow that slips onto his arm (so he doesn't have to hold it) or an enclosed ring security box (so the rings are protected if he slings it around)?

Ring Security BoxSlip on Ring Pillow

I’ve never actually seen the ring bearer hold the rings at a wedding. Usually the best man holds them and the ring bearer walks down with some sort of sign.

Hey Breanna! Welcome to WeddingWire! My first thought was along Kelly's thoughts, where the ring bearer doesn't carry them, but some sort of sign or the pillow.

My second thought was those little mesh jewelry bags. You can get a couple of them for pretty cheap and you can pull the ends, tie it together, and then have it hang around his wrist.

I'm having two ring bearers. One is carrying the ring box and one is carrying a sign. I think we'll probably have our best man and MOH actually hold the rings so they aren't dropped/lost.

So I recommend, the best man/MOH to hold the rings and give the little boy a pillow that the ring would be attached to, or something around those lines.
I am having two ring dudes, 5 and 7, they will moth be carrying boxes, but the 5 year old wont have anything in his.. maybe FH ring, because all he wants is a silicone ring.