Here's my idea for how to use them: I put one in the mesh pocket on the front of my backpack so it showed through (in addition to the lime green ribbons on it). I also wear a Passholder (from Passporter) around my neck to hold my pass and room key, and it has a clear pocket in front that's just the right size to hold the card with the green Mickey head. A lanyard with a clear plastic holder would also work. Unfortunately, we were there for 2 weeks and I never saw another one, and no one ever asked about mine either!