She's no Democat! ;-)
Turns out what happened is that my brother dropped his when they were over and didn't pick it up. Which explains the mystery! She's fascinated by sticky things, so of course had to play with it. Give her a piece of tape and she's entertained for hours...
Heh; a piece of sticky tape = hours of entertainment, guess PetCo toys isn't going to make their sales goal with your cat. :-)