Yarn!

Yarn is one of the most amazing creations, and you can make a lot out of it. You can have lots of different textures, and they're all used in different ways. There are also lots of different weights and plies in yarn, with general weight numbers ranging from 0-7, which I'll get to more later. Also, each yarn will have a specific number of plies, which are the number of individual strands that come out when you split the yarn.

Image Credit: Sewrella Yarn