I've started to practice spinning thick and thin singles. When I first started spinning thick and thin was no problem and spinning evenly was the challenging goal. Now it's the reverse! I spun up a small amount and then knit it into a rectangle just to see how it knit up. It was OK so I made it into a little bag - maybe a tree ornament or a tooth fairy bag for our guild's Christmas sale. For my second effort I spun some hand-painted rovings and then knitted them into a scarf.