My sister asked me to lock my niece's hair. She stays with us during the day so I was able to take my time. It took about 4 days to finish. It could have been a shorter time span, but no rush since she is home with us all day anyway. When we started them she was about 1 1/2 and now she is 2 years old. I have done 1 tightening and she is due for another soon. She always asks me to shampoo her hair and afterward like many of us she commences to swinging her hair. LOL These pics are from the initial installation.