Here's a drawing project that could be great for relaxation and expression, especially for teens!
I simply took a profile photo of myself, taped it to the window during a sunny day, and held a piece of drawing paper over the printed photo...
Positive Negative Space Study - RISD Pre-College on Behance
like for maybe O'Keeffe drawing. Find an object and have to re-position and draw different elements.
A Bug's Life... Great and fun simple drawing project! Sub lesson idea. (Great for a sub: read book A Worm's Diary)
Project ART-A-DAY: Lesson: Bad Hair Day (Line and Shape) http://projectartaday.blogspot.co.uk/2013/03/lesson-bad-hair-day-line-and-shape.html
Art Projects for Kids: Most Pinned Drawing Projects
13 Stunning Fashion Sketches Created Using Nail Polish Instead Of Paint
danmeth.com finish photos crazy faces
step by step directions Drawing with lines