My DS1 painted a ball of yarn about 6 years ago, and it’s been in my stash, just waiting for the perfect project all this time.
I paired it with a few balls of undyed yarn to make into a shawl for myself, so I can proudly wear his art project (he’s not really into rainbows now, so that’s why I get to keep it).
The pattern was simple - just four repeating rows after the set-up. I added some I-cord ties so that I could wrap it around and tie in the back. Though, it did come out to 91" wide without them, after blocking.