I know it's a photo challenge but you could incorporate writing into the challenge. Either an opinion on the photo, a diary type entry, or write an interesting story to go along with your photos. 30 Day Instagram Photo Challenge
If you find digital cameras too easy to use and too mainstream for your liking and wish that you could get an old Polaroid camera instead, then Urban Outfitters is the place to go. They are selling a limited edition of Polaroid cameras right now.