11yr old daughter has mild sleep apnea, tonsils are pretty small. they want to take anoids and tonsils out, is this necessary?

Depends.: In children, simply removing the tonsils or adenoids may take care of the problem. Sleep apnea in children where removing the tonsils or adenoids doesn't take care of the problem is usually treated with a c-pap (continous positive airway pressure) or bi-level positive airway pressure. C-pap is a machine that blows air into your nose via a nose mask, keeping the airway open and unobstructed.

Air is necessary: What is necessry is that your daughter get sufficient air flow during sleep. If she has sleep apnea at age 11, she will likely have much bigger problems as an adult. Tonsils and adenoids are a good place to start, and I am sure that your md would not have recommended it without benefit. Proper sleep and airflow is very important for growth and development.

Sleep apnea: Have your dentist check to see if her palate is forming correctly and she doesn't have any habits at night. Is she grinding her teeth- it can indicate a minimal airway.