|A cleverly disguised chain-link fence|
One very good question is how those tiles are stuck on. If I were to attempt this--and I'm considering it--I might start with simple kitchen and bath caulk. I think I could scrape it off if necessary. Maybe sticky-backed Velcro would work. For some reason I balk at the idea of making it more permanent. What if a tile breaks and I can't find a replacement? I also think smaller tiles might stay on more securely.
In any case, I'm charmed. I will be keeping an eye out for these tiles!