I needed to put a twin bed in our library for my brother to sleep upon, as I am not big on guest rooms because I'm not big on guests and besides my mother will also be here and she will be actually sleeping in the guest room.
I had all sorts of ideas at first. But I finally decided how to go about it. I had already decided to buy a new twin mattress some time back, even before all this wedding stuff. That made the timing perfect. However, I did not want to buy another box spring. So how to make a real bed with just a mattress?
I bought a twin frame for 39 bucks and 3 pieces of 2' x 4' fiber board (or some variation of plywood). I then had them cut the 3 pieces to 38 inches the long way making them 24" x 38". I already had risers from back when. So I put the frame on the risers and put the plywood stuff on top:
I think it looks like a plywood frog or salamander without a head. To cover up the big plywood frog, I just happened to have a bed skirt that I was not using: