[header] How to be a pretty 9 year old girl [title] Maintain your health. [step] Improve your physical appearance by having a healthy diet and exercising every day. Check your weight to make sure that you stay within the healthy range, but don't worry if you gain a pound or two. 
Additionally, stay hydrated and improve your skin by drinking at least eight glasses of water per day. If you take good care of your body, it will show in your appearance.