A rope bracelet - reminds me of making friendship bracelets back in the day. My right second toe used to go numb because I'd hook the end of the bracelet over it, and then knot embroidery floss for HOURS.
Relaxing fun is easy. I don't have to hone skills or take action. There's very little coordination with other people or preparation involved. Watching TV - the largest consumer of the world's time after sleeping work - is relaxing fun.