Cut a strip of Duck Tape®, twice as long as you want your keychain to be.
Fold one side a third of the way in, leaving some of the sticky side showing.
Fold the opposite side in toward the middle.
Add a strip of a different color or print down the center of your bookmark.
Loop your strip through the key ring and use a strip of tape to secure your keychain.
Add a hook and loop fastener to the ends of your strips.