the only thing the cats steal are used (yuck!) q-tips. They will even hunt for them in the trash can!
OMG! Now that you mention it, I remember all my kitties have liked playing with used Q-tips! Maybe someone should start making cat toys filled with ear wax - EEEEEEWWWWWW!!!!!
My cats really aren't thieves as much as they are destructive (like when they broke me tv, it's been months and I'm still angry about that).
I would love to hear how this happened - hard to picture 2 sweet fluffy cats doing this!