DIY Optical Illusion Wooden Gems from Fabric Paper Glue here. You only need three colors of paint for each color of gem - white and black being two of them. Really good tutorial for mixing your shades of paint plus these wood rectangles are so cheap at Michaels.
Designspiration — Pencil Vs Camera by Ben Heine I Art Sponge
Shrinky Dinks tutorial for your zentangle doodles!
darn...wish my doodles looked this good!