WK has released a Christmas Tree interact-able item for your cats! From the official website:
Cats get a Xmas Tree, this is a special tree just for the cats. You may enjoy it too because it is a pretty Xmas tree that has on off particle lights and 6 different versions of tree textures. The cats can play with the tree like many cats do and if they happen to knock a ornament from the tree they get an extra ball toy for a few minutes before it magically hangs it self back on the tree.