It's lovely to be able to have an uncomplicated project that you can work on in the unexpected free moments that may occur in your day - the waiting room or train journey (or the car in my case, when you're waiting for the football training to finish!)
I have a drop spindle that travels with me. As I create the yarn I'll be using it in a cowl (or scarf perhaps) using an old stitch called Broomstick Lace. It will be easy to add in the new yarn as I go.
Broomstick lace is like a mix of 'casting on' from knitting and simple crochet and all you need is the yarn, crochet hook and something thicker like a very big knitting needle or handle of a wooden spoon. But, as we're talking portable here, I'm using a four-in-one Bic pen.
I made a small sample first and washed it - this really gives you an idea of how the finished stitches will look. This is the tedious/unexciting bit but it's worth it as you can make changes at this stage that will save disappointment later. My yarn is lace weight so the stitches are quite small - you can vary the type of yarn and the size of the lace holes to create the effect you want.
I'll keep you posted on how it's progressing!