The lap blanket I posted about here is finished!
I used a 5mm crochet hook and 8 ply acrylic yarn double to do the coloured squares, and then crocheted around them in a single strand of 12 ply acrylic (still using the 5mm hook). After sewing up the blanket I crocheted an edge around it using a 3.5mm hook and cream 4 ply nylon yarn used double.
You can see the edging a little better in this photo:
It was a good way to use up some of my left over bits and pieces of yarn :o)