Here are some heat free options to help you curl and style your natural hair.
The first one is curlformers, you ca get your curls without using heat, pull your hair through the curlformers and you will have curls for days.
The second on is rollers, you can set your hair, dry then it will be as curly as can be.
The third one is flexi-rods, easy to roll your hair on to it and your hair will be curly when it is removed.
The fourth one is straws for straw-set this will help to give you curls.
The fifth one is to use hair pins to do pin curls and it will create heat free curls as well.