Ah, cats are so curious and playful. Decorating for Christmas with them can be quite the challenge! To keep them from climbing on the tree or knocking over ornaments, try using a sturdy tree stand with a secure base. You can also keep the lower branches bare and place your favorite ornaments higher up. You can also consider using artificial trees or potted plants that are less likely to break and cause injuries. Additionally, avoid using tinsel, as it can be dangerous if eaten. And most importantly, keep an eye on your feline friends!