From my experience, In most cases the products are made in the featured color and fabric. There are some items that are offered in different colors on the site. As for the daughter, I suggest using the measurement chart and submitting it to see if it can be accomplished.

There are some options to change the color for some of the dresses, but they're in a very specific area of the website (basically "I'd like dress A in the fabric of dress B"). For the most part, you can only get the dresses in the color/pattern shown, but you can customize a lot - sleeves, hem length, neckline, etc. - as well as going full custom with your actual sizing.