Cats are naturally curious and playful animals, so it can be difficult to keep them away from the Christmas tree. One way to discourage them from climbing or playing with the ornaments is to place some scents around the tree that cats find unpleasant, such as citrus fruits or peppermint oil. You can also try hanging some tinsel or ribbons from the tree, which cats may find tempting to chase but won't hurt them if they swallow it. Additionally, it's a good idea to keep the ornaments out of reach of the cats by placing them on higher branches or securing them with wire.