Hi my name is sheena I have a 4b hair type. I have a two year old girl. She has my hair type also. I see what you are saying she has a lot of shrinkage. What i do for my daughter is after I wash her hair I towel dry it, then put a very light oil moisturizer, like jojoba oil 100% natural,and do gentle cornrows about 6-8 whatever works for your daughter's hair, the cornrows need to be lock closly, but gentle enough not to hurt. The hair doesn't have to be completly dry, but it shouldn't be dripping wet. You can put some light cream moisturizer like Eden Body works milk works well, but you can use any light moisturizer. Put the cream in before braiding, after braiding let it air dry for about 5hrs. To remove braids make sure the loosen the braid carefully so you have some loose curls, then you can style her hair in curly puffs, sections of 4 whatever you like. Please let my know how it works for her. ever evening after school put the braids back in with a light hair milk and it should last for as long as you like. she will not have very straight hair, but it will have lenghth and shine. I suggest to use shampoos and conditioners without parabens and synthetic ingredients. Eden Body works has a great line. Organics has a nice line if you are looking for gentle shampoos that won't dry hair fragile curls, but promotes strength and moisture.
God Bless you and Family