It's something I learned about while browsing through a pile of art/craft books while reading other books to my kids in an effort to find inspiration and keep my kids entertained. I LOVE the bookstore. However going with kids who love books but don't read is hard!
Of all the techniques I scanned through, this one stuck in my mind for weeks. I finally tried it. It's addictive.
I wish I remembered what the book was called and I would give it credit here. One of these days I hope to find the book again.
Here's a peek to a few of my doodles: