We have three daughters. Our oldest is almost 13. When she was little, probably just over 2, I started french-braiding her hair and putting curlers in occasionally. That lasted until she was old enough to decide she didn't want them anymore (maybe 8 or 9).
Our second daughter has naturally curly hair so I don't do much other than combing it and sometimes french-braiding it when it's wet.
Our third daughter, now 6, has straighter hair like her older sister's hair. I have braided it, etc. but that's about it. Tonight I found some foam curlers and asked if she would like her hair curled. She was enthusiastic so I did it.
A little while later, she came to me with a hug and a kiss and said, "Thank you, Mama." It takes such little things to make this child happy! What a good reminder for me - to take the time to do special things for this youngest one!