How to Crochet a Bobble Stitch
The bobble stitch is essentially six double crochet stitches all folded into one.
To start yarn over and start the double crochet. Pul up the loop and yarn over again.
Pull the yarn over two stitches but don't finish the double crochet leaving the first loop on the hook.
You should now have two stitches on the hook.
Then you'll do the same thing again. Push the hook through the same stitch as the first one, yarn over, pull up a loop through the stitch, yarn over, and pull through two stitches.
You should now have 3 loops on the hook.
Do this three more times until you have six loops on the hook.
Then just yarn over one more time and pull through all six loops.
Finish the bobble with a single crochet in the next stitch of the project and your done.