Help with my daughters hair please!!!?

She has REALLY thick afro hair, my problem is finding an essential oil or a mixture to keep her hair moisturised? I used to use a kiddie hair grease but I've discovered all those ingredients are not good and have switched to making my own moisturisers with natural essential oils for us both using Almond, Olive & Coconut Oil. While my hair will retain the moisture my daughters does not, any ideas on which oils will please???