help me

Hello my name is Maggie and I have 3 mixed raced babies. My oldest is 4 and her hair is beautiful but crazy. it is very tight curls according to this sight she is 3c. Its soft but frizzy. I have asked my friends how to maintain her hair and hairdressers. I need help. what is the best way to brush her hair such as hair brushes. what products are good for her she has tried all the kids products a lot of them leave her hair really weighed down or like a stripped feeling. and she loves to ware it out what are good styles for it. also how do I keep it from getting like a nest when its left out. please help me. I really don't want to be "that mom" lol I did add a picture so you could see her hair. please help