Monkey's fist

Okay kiddo, have you ever played with a ball of yarn before? Well, a monkey's fist is a knot that looks like a ball made out of string, but it's used for something different. It was actually used by sailors a long time ago to throw a rope from one ship to another so they could tie the two ships together.
Nowadays, people use monkey's fist knots as decorations, keychains, and even as weights for throwing lines or anchors. They can be made out of any type of rope or string, and it takes a lot of skill and practice to tie one perfectly. So basically, a monkey's fist is a cool knot that looks like a ball and has a very important job!