Freaking awesome and so creative! cardboard art made by cutting off the top layer of corrugated cardboard to reveal the inner layer, and adding some color. It ranges from Mario-themed pixel pieces to elaborate portraits of celebrities.
DIY Recycled Cardboard Picture Frame Tutorial from by Tarun Upadhyaya on Instructables here. It’s not just one but several very detailed tutorials on how to transform cardboard into a number of different frame designs.