It helps to be prepared for the common cold or to battle the flu. You might want to have a small plan for when you are sick.
Whether they are curling up with a pile book of their own, or you are all taking turns reading.
Hull out the board games that have been gathering dust, or card games that haven’t been used in a while.
Relax, and have a quiet day without worrying about homeschooling. It is not going to hurt, it might just give everyone the rest they need.