M.E.
they are many rpoducts that you can use for her hair. as a hairdresser i can recommend some for you. 1st off you need to make sure to keep the dead ends trimmed off, that will help with the frizz the most. pink oil might be a little heavy for her hair, but you can try rubbing jsut some regular baby lotion in it or a curl defining cream or glossing cream. great clips(that's where i work) sells a great glossing cream in their private brand. it's about $10 and a little goes a long way. jsut rub a dab in on wet or dry hair. it's help add definition to her curls, reduce frizz, add shine, and won't weigh her down. you might have to experiment with a few products before you find one that works for you, but i hope this gives a starting point.