Here's a little fun discovery: Jimi Hendrix noodling around with a homemade one-string broom guitar! It was the Summer of Love, 1967 when the Jimi Hendrix Experience sat down for a fun photo shoot. The iconic power trio goofed around with props on the set, Jimi brandishing a push broom that had a string tied to it like a guitar.
The guitar obviously wasn't a playable instrument, but I wonder if it brought back memories of Hendrix' childhood:
“Eight year old James Marshall Hendrix wanted so much to play the guitar to set his poems to music that he used a broom to strum out the rhythms in his head until he crafted a cigar box into his own guitar.” (Pittsburgh Post Gazette) Jimi’s cigar box guitar had rubber bands wrapped around the box, serving as strings. -From the CigarBoxGuitars.com article, "Cigar Box Guitar Heroes: Music Legends and Their Cigar Box Guitars."
Here is the full photo, featuring the entire band.