I bought some gift card holders from Dollar Tree to use as the base of another project, but when I got them home I realized they weren’t going to work for what I wanted. While I was deciding what to do with them, I realized the gift card slot was (more or less) the same size as an ATC, so I decided to turn them into cards for swapping ATCs.
I made a big painty mess on some book pages and then glued them to the fronts of the holders and trimmed them down. There was also a little flap on the holder that I cut off. They’re a bit…informal, as Mary Berry would say, but they’re done!