Whatever the medium there is the difficulty challenge fascination and often productive clumsiness of learning a new method: the wonderful puzzles and problems of translating with new materials.
You can involve yourself in electronics computers puzzles... there's a lot of creativity and brain working. There's a lot to model trains that people don't realize.
It was used for decades to describe talented computer enthusiasts people whose skill at using computers to solve technical problems and puzzles was - and is - respected and admired by others possessing similar technical skills.
I am interested in a lot of things - not just show business and my passion for animals. I try to keep current in what's going on in the world. I do mental exercises. I don't have any trouble memorizing lines because of the crossword puzzles I do every day to keep my mind a little limber. I don't sit and vegetate.
Amazingly when you add life and consciousness to the equation you can actually explain some of the biggest puzzles of science.
Age puzzles me. I thought it was a quiet time. My seventies were interesting and fairly serene but my eighties are passionate. I grow more intense as I age.