Yeah, I don't know what it is, but the sound of a ping pong ball just sets her off, lol... Too bad we're about to carpet all of the upstairs, lol. (We can always still play ping pong downstairs though.) The pen was cool because it kept the ball from going very far and/or underneath furniture.
She doesn't like the mini tennis ball we bought her at Petsmart, or the little stuffed squeeky mouse, nope, she likes ping pong balls (which, of course, are far cheaper than most cat toys, lol) and annnnything with feathers. (I had these little feather things from hobby lobby that I was going to use for hair ornaments - and yeah, she pretty much appropriated them.) She also likes the stuffed hedgehogs that Wes and I have on our desks - a lot. They end up on the floor a lot. (So does Wes's turtle.)
She loves the cat dancer Dawn got us too... Somewhere I had a video of her playing with that too, I need to find it...
For the most part though, she seems less interested in actual cat toys and more interested in random junk, lol...
She has a fascination with my desk lamp too, which is highly annoying. (I can't let her in this room unattended for any reason - just because of my lamp
)
I'm pretty much terrified that she's going to chomp down on one of the bulbs one day. So, I burst her with canned air every time she gets near it - and close off this room when I'm not at my computer working. (I think it's a given that this room will ALWAYS be closed off if we're not here.)