This is her fourth one. Last year she did the coloring challenges in March, June, and October.
On Day 2 of the current challenge, there was also a blog hop. I like watching the coloring videos. Most of them are done with Copic markers which I don't have, but I still pick up a lot of coloring tips.
The idea is to color something, anything, using any media at all every day for thirty days.
Daria