The Shoebox Guitar It was pretty easy to build the Shoebox Guitar, and it took me about 10 minutes to build it, but I could have put a little more effort into it, though.  It's a little funny but I used a small pen for the bridge of the guitar.  I used 3 rubber bands for the strings. And finally to put it all together I used a shoebox for the center of the guitar, technically it was the first part of the guitar but it's the most important piece.