So today being a holiday, I needed a very quick project so I used cardboard cut from a tissue box for the covers and double-sided scrapbook cardstock. This is very similar to the first Zutter ATC book I made some time ago. One of the papers had a nice stripe on one side, but a very bright pink floral on the other side, so I sponged gesso on and wiped off to tone it down.
I just scanned the ATC backgrounds I made yesterday with alcohol inks and canned air. These are precut ATCs with the aqua stripe down the side and I have a huge box of these given to me at the March swap.