I paint with acrylics on canvas, they are fast drying. Many people paint on paper. Others on wood panels. I don’t know what got me started. I look at something creative and say, “I can do that.” I buy the supplies and go at it. No training, just instinct. My paintings aren’t very good compared to so many artists I know, but I have fun messing around. Except lately the fun has walked out the door and I’m left with only the work, and that’s not cutting it for me.
“That’s normal,” an artist friend says.
“It happens to all of us,” another says.
“Hang in there, it comes back,” a third says.
“It isn’t happening for me,” I say.
“You lack patience,” Alf says.
“You want instant gratification,” my son, the artist says.
“You darn right,” I say.
“What if you were an architect, you want the whole building to go up overnight?” Alf says.
“That would be nice,” I say.
Calvin says, “I understand. You live with people who take years to grow up, you deserve an instant turnaround somewhere.” 
I used to paint with oils on canvas. Last project was a bouquet of roses, c.1980. I lost the desire. It never came back. Now I color!
Between the lines, like in a coloring book?
Yep, they have all kinds of coloring books for grown-ups now! (They call them “Adult coloring books,” but that’s problematic, unfortunately.) I like the ones with geometric patterns. And Bible verses. 🙂
I’ll have to check them out.
https://www.amazon.com/Coloring-Books-Grown-Ups/b?node=11357541011
You can use crayons, markers or colored pencils, or all of the above. You don’t even have to stay inside the lines!
Wonderful stuff!