When you open the paint brush menu there are three options: Flowers, Sky, and Texture(decorative, paintbrush and texture accordingly). Using the Sky option go all the way to one side and pick the last brush, then make a mark or doodle, then move on to the next one. Do this all the way across and the achievement should unlock when you reach the other side of brush options.
However it's best to do this once you get all(or most) sparks as when you unlock sparks they unlock new brushes and to save from confusion of finding that brush as you unlock it, it's best to do it all in one go.