We put up our Christmas tree - such as it is - today, while the Goober was napping. When she woke up, she walked out into the living room, stopped dead, and said 'ooooo'. Then for another half hour, she kept pointing at the tree and telling me "Wook. A twee!" Here's a photo of the pointing, after I thought to get the camera.
Here she is, admiring it. You can see we've yet to get anything but lights ON the tree. I'm not sure I even want to bother with decorating, because the kid won't leave the tree alone. (Plus she pulls ornaments off other people's trees and I'm not in the mood to fight a war over it every day.)
Sekhmet is also quite pleased by the idea of foliage in the house (she's an indoor kitty) and has spent a lot of time wandering around under it, gnawing at the branches.
Considering the tree is artificial, I half expect to get up one morning to find fang bits on the carpet and the cat saying "Meowth".