Okay so all of us girls would LOVE to have gorgeous curls without the heat, but sometime it just does work :( but here are a few ways that have seemed to work really good for me and my friends :)
1.) when you get out of the shower and your hair is still wet, twist a section of your hair tightly and secure with a rubber band. You can leave this overnight or blow dry it for a quick morning style :)
2.) okay this one is just like the last one but with a few more added steps to get curlier pieces. Repeat number one and then take two twists (make sure they are both tightly twisted) and twist them together to make a double twist. That's all! A few tips for this one though are: 1.Spritz all of the twists with a bit of water.
2. Sleep in them overnight, this actually works a lot better than blow drying

3.) Twist your hair and when done make a mini-bun on your hard and secure with a bobby pin.
Okay, I hope this helped :)