Traditional way to display pictures: frames
Modern way to display pictures: acrylic and wood blocks
I love using wood blocks to display photos. I'll keep about 8 photos in one block. It's so fun to have several 5x5 size images to switch around whenever I want. It keeps the display fresh and I love the variety!
The acrylic blocks are also great for displaying matted prints. If you get a memory box with your favorite matted prints, the block is a great way to display them one at a time.