For the Kitty Corner Bookmark, you will need to print the PDF onto paper of your choice. Cut it out along the solid lines. The one tricky part is around the ears---a slit is required on the outer edge of each ear.
Carefully apply glue to the flap with the stars, and overlay it with the flap that has hearts. This will form a pocket of sorts.
Now you have an adorable Kitty Corner Bookmark!