More ideas from Denisa
No heat curls!

How to rag roll your hair - Dampen hair. Twist a section of hair around a strip of fabric. Tie the fabric strip in place and repeat until your hair is rolled. Sleep on your rag rolls and remove them in the morning for pretty curls!

Another no heat way to curl

Naturally Curly Hair Tutorial: when I did this with my naturally curly hair I looked like Sideshow Bob. I think it might work with hair that's NOT naturally curly.