All of our walls are cinderblock, which makes it very difficult to hang anything. I brought some pictures with us to decorate, knowing we would be limited with decor. After a few unsuccessful attempts at double sided tape, a great neighbor who gave me a few of her 3M hooks, and some inspiration from my dryer...
Crew had a random shelf (with out a shelf) in his room. So we utilized the same idea and displayed some of his artwork as well!
I know it is not the most classy, but it works and I have pictures on my walls. And by the way, don't you love the seafoam green color everywhere?!! :)