Normally in colourwork (e.g. Fair Isle) you carry the yarn you aren't knitting with at the back of the work. This forms strands of yarn called floats.

I decided to experiment and see what effects I could create with 'front floats' instead, where the yarns are carried along at the front of the knitting. As you'll see in the video below, this creates a striped pattern of loose yarns. You could create an interesting feature this way, and I'd love to know what you use it for!