Need Ideas for Cat Anniversary

Thursday will mark one year since I got my little Russian Blue kitty Niobe.
Like Emma, she was a CraigsList acquisition.

I'm trying to figure out something nice to do for her. After the first couple
of months, where she was eating everything in sight and bulking up
substantially (I think the previous folks underfed her), she isn't
particularly picky or gluttonous about food. So there's nothing obvious to
feed her as a treat.

About her most blatant like is destroying cardboard, strange as it sounds.
Almost every box in the house - and I'm quite a pack rat - has been shredded.
I'm thinking about finding her a nice big cardboard box to ruin. But perhaps
someone here will come up with an off-the-wall idea for an unfamiliar cat.

I've posted this before, but here's a picture of Niobe up on my big ten-foot
stepladder.

http://www.ocrebels.com/NiobeOnLadderResized.jpg

Art