This is a collection of bottle openers that my son (age 9) and I made from 16D common nails. Some of them work better than others. I tried to incorporate a variety of designs.
The plaque that holds them hangs on a wall and the bottle openers (nails) are held in place by magnets (neodymium magnets from hard drives) installed in cutouts in the back of the plaque.
The project page is here:
Bottle Openers Made From 16D Common Nails | Scorch Works Blog
Here is a link to a YouTube video of each design opening a bottle: