Instructions
To make a bobble also known as popcorn stitch - To create a bobble in your work simply crochet 5 stitches in the same stitch.
Remove hook pulling as you do to make loop slightly larger.
Insert the hook into the first stitch making up the set of five.
Pick up the dropped stitch and pull on wool to tighten up again.
Wrap wool around hook and slip off the 2 loops.
Continue to crochet as normal unit you wish to make your next bobble.
Depending on which way you want the bobble to go (to the front of your work or to the back) dictates how the hook is inserted.