DIY African Masks
I got this next idea from Pinterest, which showcased a large variety of African style masks that someone made out of cardboard. Some of these faces also look like they might be Picasso paintings. I would personally look at an existing mask, and use that as a template for what you would want to make with your own cardboard. Use a blade or sharp scissors to cut out the pieces. Then use a hot glue gun to attach everything together. They look so cool that you can easily paint them and hang them on your wall if you wanted to. This would be really cheap artwork for you to put in an apartment or a dorm room. For instructions on how to make this, watch this YouTube video.