I wanted my hair to be wavy without using a hot tool; I took the following steps and was very happy.
STEP 1: Wash hair and detangle
STEP2: Towel dry hair
STEP 3: Braid damp hair
STEP 4: Spray leave in conditioner and holding gel
STEP 5: Go to sleep
STEP 6: Remove the braid the next day and voila! You have wavy hair.
**If you want to achieve curls just twist your hair and use thin rubber bands, you will be impressed.