You don't want to rush into getting a design done and then realize that it isn't what you had envisioned. This is especially important when choosing something for your daughter. Make sure that you give her plenty of time to decide on the design before rushing into it.
Once you have found a design, make sure that you have all the material ready. This includes the fabric, paper, and frame that you will use. The material that you choose should complement the design that you have chosen. Many websites sell custom photo frames that you can use to display the photos that you will be displaying on them.