Okay kiddo, do you know what knitting is? It's when we make clothes and other things by looping yarn with special sticks called knitting needles.
Well, an i-cord is a special kind of knitting that makes a long, skinny tube that's really strong and stretchy. We knit it using just two needles and a small number of stitches, but we keep knitting the same stitches over and over again.
The i-cord can be used for all sorts of things, like thick drawstrings for a backpack, or handles for a purse. It's a bit tricky to learn at first, but once you get the hang of it, i-cord knitting is a lot of fun!