This is a simple project that is good for beginners and is fun to build. You could build it for fun or if you have a son in need of the music merit badge if he is in scouts. It only took 30 minutes to an hour, so it's pretty cheap and fun! Double win!
Step 1: Materials
Since I have decided to share this after I built it, fail! I can only tell you what the materials are.
an Altoids can,
a wooden dowel,
an eye hook,
a guitar string,
Step 2: Watch the Video
I can explain the guitar a lot better in the video than typing it all out.