Sometimes it's fun to do things when there's no real world consequence attached to failure and experimentation even if the mechanics are similar to something we

Sometimes it's fun to do things when there's no real world consequence attached to failure and experimentation even if the mechanics are similar to something we do for work. I sometimes do project euler puzzles for fun. I'm a CS professor - this starts to feel kinda close to my job. But it's relaxing and there's no pressure and no one is affected when I screw up; I just get to keep kicking at it, or put it down. The freedom makes a big difference. The "solving an interesting problem" part of my job is the part I love. It's the other stuff I need a break from sometimes. :)