This may be a good time to learn a new skill or take up a hobby. There are some ideas below.
Origami - You can learn to make lots of interesting designs using old scraps of paper, or maybe some old notes you no longer need.
Learn to draw - This free resource will give you the basic skills and advanced techniques to improve your current drawing skills.
Cass Art offer some really good art tutorials.
Learn how to code - This site offers free and subscription memberships to help you learn HTML, CSS and Javascript coding languages. From building basic websites to designing interactive web-apps, there's something for everyone interested.