My daughter is nine
Her hair used to be very dry but since I stopped using oils and products with silicones on her hair it isn't dry and it stays soft
I use Aubrey Organics Honeysuckle Rose(moisture) or GBP(light protein) on her hair before I remove braids
I apply it to her dry hair and then remove the braids
since I started doing this she doesn't have dry ends and she doesn't loose hair when taking down braids
I like to use Elucence Moisture Acidyfying poo or Queen Helene unscented garlic to shampoo her hair
For a conditioner I love Dudley's hair rebuilder(mild protein w/ moisture)used with a heat cap #1 choice for her hair
Elucence moisture balancing cond is excellent for very dry hair use w/heat cap
I don't apply any leavins they make her hair too soft the braids don't hold up well
I section her hair and detangle with the Denman D4 and then reclip the sections.
I blow dry her hair on med heat in sections with a comb attachment then put "grease" on her scalp (My honeychild Sophia's Old Fashioned Hair Grease)
I cornrow her hair then use any petroleum based grease to seal the last 1/2 in of the ends of her hair then I tuck the ends up into a bun
she sleeps on a satin pillowcase with a satin bonnet.
During the winter I shampoo her hair biweekly (every Sunday)
I rebraid and regrease her scalp in between once a week on Sundays
I got the basics of my routine from my sister in law who's son is nine and has brastrap length braids.Low manipulation,sectioning the hair,shampoo,cond,lubricate the scalp and protective styling really has helped my daughter's hair. Sistaslicks post on protein and moisture is a must read.Once you understand how to balance the moisture and protein levels as needed it really does change the health of your hair.
I Hope that you find a regimen that works for your little girl