I never bought sunglasses for kids. But i see many lovely sunglasses with colors for children. If you want to choose fashion sunglasses for your kids, you can try some bright colored frames with dark lenses in oval shape for kids. They will be look cute on your daughter. Again, i think you shall pay more attention to the quality of kid's sunglasses. A pair of light weight, impact resistant and UV blocking.
Colorful, adolescent frame styles are still available, but sunglass companies have found a niche in appealing to children's desire to look like their parents or older siblings. Oval, round, rectangular, cat-eye and geometric shapes are all popular in cool, sophisticated colors like green, blue, tortoise and black. Metal frames are very popular, but so are plastic sunglass frames that look like scaled-down versions of trendy adult styles. Also, sporty styles for kids like wraparounds are available in miniature adult editions. Source: https://www.allaboutvision.com/sunglasses/kids.htm