I decided I had to do a project that included them all, so it became a sideways garter stitch scarf. (This decision was based on my strong desire not to have to weave in eighty ends Ü)
I just did a row of each color, holding the yarn doubled and using 4mm needles. So there's a row of purly bumps on each side in each color.
It's 120g. I had lots of left-overs in all the colors except what I used to cast on and off (probably because I was using a bigger needle). I think there were about 240 stitches per row, and it's 125cm long (175cm with the fringe). It's only 10cm wide, though. Garter stitch is so compacted. But it's nice and thick, soft and warm.