I don't currently have a photograph, as we're still figuring out exactly what to make it out of, but I can get you one soon.
It's not illegal outside, as far as I know. What I meant by "child leash" is those harnesses some parents buy for their children to keep them close by https://encrypted-tbn0.google.com/images?q=tbn:ANd9GcQlOFro2WwdzV-IlNL1BUj7TwEdVumQ9RMVIcjpz57yCAFTIP7ZSQ
(I don't really like parents that use child leashes on children, I was just using it as a comparison of something legal people do in Ohio.)
After reviewing the episodes, my friend and I still need to talk about specifics, but we're thinking it will actually end up being a small string wrapped around his chest, right below the breast bone, two or three times, preferably not very tightly. I'll get you even more specifics as we talk over it, and a picture as soon as we build it.