Looking at the origami reminds me that I used to spend time folding birds, hearts, butterflies, and octagons that turned into stars. I would use different colored paper to fold them.
I also learned to crochet beanie hats. It was time consuming, but rewarding to see the end product. If I had some yarn and a crochet kit, I would be making some serious beanies.
There are so many things people can learn to do in confinement. It's up to them to find what they like to do.