Yarn over, insert hook into the stitch, yarn over, and pull up a loop
Yarn over, pull through 2 loops on the hook
Repeat the yarn over, insert hook, pull up a loop, yarn over, pull through 2 loops process in the same stitch several times
Keep all partial double crochet loops on the hook until the bobble is complete
Yarn over and pull through all loops on the hook to close the bobble
Work a single crochet or other stitch after the bobble if your pattern requires it
Place bobbles on the wrong side or right side as directed by your pattern
Count each bobble as one stitch unless your pattern says otherwise