Though it’s difficult to supress the naturally inquisitive nature of a cat, you could try to place Christmas decorations in strategic locations around your home where your cat won’t be able to reach, such as high up on the wall or ceilings. If it’s a Christmas tree, ensure you place it on a sturdy table and don’t leave your cat alone with the tree for long periods of time. Keep decorations that could be get smashed (glass baubles, or delicate figurines) higher on the Christmas tree, and save the fluffy, non-breakables items for the bottom.