Go solo, or turn it into a fun family activity if everyone's just laying around. If you find yourself continuously drawn to a specific subject like Impressionism or the animals of Amazon rainforest, set up a queue of documentaries, articles or books on the topic. Do a deep dive on a subject that interests you.
Or a play - anything that's out of your comfort zone. If you don't know how, this is the perfect time to learn how to pluck out your favorite tune on the piano or guitar.