A bobble is usually a group of several double crochet stitches joined at both top and bottom. It is often surrounded by shorter stitches, and worked on a wrong-side row. 1. Wrap the yarn over the hook, insert the hook where required, pull a loop through, wrap the yarn over the hook, pull through the first two loops. 2. Repeat step 1 two (or more) times in the same place. 3. Wrap the yarn over the hook, and pull through all loops.