Step 1: Materials
Purchase a 3/4 x16 x 36 board at your local hardware store. I purchased side-glued paint-grade panel, not the strongest as you will see. The 16" width is perfect for most laptops. I had the associate cut the following lengths: 13", 13", 4", and 5.5" ( the remainder).
These dimensions are dependent on the size of your laptops.
I also purchased a pack of #8 x 1 1/4 flathead wood screws.
Step 2: Assembly
Since this project is meant to be easily customizable, feel free to mess around with the dimensions. My home laptop has no connections in the back, so I did not need much depth.
Notice, in the last image, the plastic corner support I added. I think this is the part of a bookshelf that secures it to the wall.