We have two cats that do similar stunts. I was using pins to post things I wanted to keep on the wall......every morning I'd come in and the pins were gone! One day I caught him.....Dasher was pulling the pins out and dropping them on the floor..one by one....DANG cat!
Now the new things is stealing yarn out of my yarn bag. So I lock it up and gave them a small ball of yarn. Every morning we check to make sure where the yarn is before getting coffee....there's a chance we're booby trapped. One morning the lamp went flying because they'd strung the yarn around the lamp and across the hallway about 4" off the ground!!!!!