Here's the video tutorial on how to curl your hair with an elastic headband!
I did it to Meg and we used a headband that was too tight and ended up hurting her head after a while. So use the flat ones that aren't as painful, and then maybe you can sleep in it!
We used slightly damp hair and kept the band in for only a few hours, but it really did work. Unfortunately, the one picture we have from this day looks like a before, not an after! Watch the video; the curls looked like hers. It's great for a little change and not sleeping on curlers.