Here's a drawing project that could be great for relaxation and expression, especially for teens!
Botanical drawing | Flickr - Photo Sharing!
Living in a world of dots and squiggles…
Zenith | Zentangle Tangle August 2015 | Diva Challenge #233 | String Thing #107
zentangle pattern tutorial
# Zentangle My Zentangle Doodle Reference Sheet #1
Zentangle DIY ink bubbles tutorial by ~yael360 on deviantART