Heat-free way to get gorgeous curls and volume

Here's a tutorial for achieving lovely curls without heat. I stumbled onto it since I don't own a curling iron yet. Plus I try to avoid heat-styling my hair unless there's some special ocassion.

All you will need are:
-Slightly damp hair
-A bunch of bobby pins
-A little hairspray
-Blowdryer with "No Heat" setting (I think this is optional).