This is a nice little puzzle...but it does not come with a solution. After digging around online, I finally stumbled across a YouTube video featuring Diamond Jim Tyler and two colleagues which featured the puzzle. An explanation was informally discussed. I had some trouble with the puzzle but two of my young grandchildren figured it out from jump street. As an amateur magician and heavy-duty Sherlockian, I had to have this in my arsenal. It's a puzzle (vs. an effect)...but there is a small trick to it. If you like a reasonably priced and quality made novelty, you might enjoy this one.