I love old photos, cards , bits and pieces. SO I have been having great fun with altered art, ACEO's and ATC's to be exact. ACEO's (art cards editions and originals) and ATC's (artist trading cards) are mini pieces of art measuring 3 1/2 ins. by 2/1/2 ins. Any art that you can fit on it is exceptable. Collage, painting, drawing, assemblege,....are all perfect for this format. I like adding eyelets and wire hangers to mine. Some people like to collect them like in plastic sleeves like baseball cards but I like mine hanging on my bulletin board. They usually come signed and dated on the back. Take a look at what ebay and etsy have to offer in this tiny art form. It's addicting.