10 stitch Blanket - it spirals till you run out of yarn. And you only need a pair of little double-pointed needles to do a whole blanket. None of the tedious pick-up-stitches across a whole long seam, as you have to with most "log cabin" patterns.
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.