I'm still working on getting back in the habit of drawing and this was an idea I had recently for coloring by shape. There are 6 different shapes in the circle, and my example was colored in using rainbow colors for each shape.
It's fussy and hopefully calmly meditative for people who like coloring in simple designs with a lot of small areas.
Click the images below for larger versions to print and color.
Small jpg version:
Large png version: