Welcome! From the photo your daughter's hair looks super-fine, and that type of hair needs more moisture and hydration than you think. (she's also quite a cutie BTW). Condition wash her hair with a cheapie like Suave Naturals Tropical Coconut. Condition with a more moisturizing conditioner and leave it it. Rub a soft butter on her ends, and gel with a good Aloe Vera Gel. Keep her dry hair hydrated with a good butter/hairdress type product.
Co-wash - Suave Naturals or Generic Biolage Matrix Hydrating balm
Condition - Mop Top is great (on-line) very moisturizing and detangling and you can leave-in it. They also make Fuzzy Duck for kids, but I've never tried.
A good detangling leave-in is MOP leave-in
Butters/hairdress: Jane Carter Nourish & Shine - ounce for ounce this stuff rocks on wet or dry hair; Qhemet Burdock Root Butter cream (wet or dry); Jessicurl Weekly Deep Treatment - it's a deep treatment but I use a dab as a hairdress on dry hair - super hydrating; Devacurl Set it Free
It's okay to co-wash her hair frequently. The more you do it, over time the less you will have to do it. I used to co-wash almost every day. I now wash every 3-5 days.
Aloe based gels - Kinky Curly Curling Custard
, Theraneem Aloe vera gel; Aubrey Organics Mandarin Magic Jelly.
Castor oil is also good. Add a bit to conditioners, rub a bit on wet ends. Use a little over your gel. It's very versatile and is CG as long as you use just a little
For shampoo I highly recommend Chagrin Valley soaps (not the shampoo bars, although I hear they are good). The soaps are more moisturizing.