It costs nothing (assuming you own a crochet hook and scissors),
You will need:
First you need to cut down the plastic bags into "plarn" plastic yarn, so you can work with it.
Then crochet into whatever design you want, I alternate between colors and it creates a color wheel, the ones I use on my table are all different colors, you could just save up the same type/color of bags and make them the same or create "sets".
If you'd like to learn how to make the "plarn" I will be uploading that shortly.
Thanks for stopping by I hope you enjoyed this quick and easy way to reuse plastic bags that we have too many of!