I recently purchased Curly Q Milkshake for my 6 year old who has what I think is a mix of 3c/4a hair. So far its been keeping her ponytail curls pretty defined. I'd been keeping the pony in braids up until now. I haven't tried it all out yet..her hair is mid back length so I don't let it all out very often.
We don't really have a routine right now. I've trying different products out: KinkyCurly, Miss Jessie's, etc...I usually just wash with a conditioning shampoo, comb out with conditioner and apply a leave-in conditioner.