Step 1: Materials And Cost
1. Some board to hang the pictures on - I had a few pieces of pine just sitting in the garage. Make sure that the board is wide enough to accommodate the picture and the hook. Mine were 6" which was perfect - the pictures take up most of the space.
2. Some bulldog style clips. I got a box of 36 for about $9 from Amazon
3. Small screws - to attach the clips to the boards. I had a handful in the random screws I've collected over the years.
4. Stain or paint - while this is technically optional it is a low cost thing to make the project have that finished look. Most of the wood in my office is stained dark walnut, so I went to Lowes and picked up a $5 can of Minwax for the job.