Answer: See explanation
Step-by-step explanation:
‘’Only today I wish I didn’t have only eleven years rattling inside me like
pennies in a tin Band-Aid box". This is a simile.
The pennies simply refers to the emotions that are rattling inside Rachel. It simply helps us understand the age level or maturity level in a moment. The tone that it's trying to create is an anxious tone. Rachel's emotions are said to be bouncing within her as loudly as the pennies that are in a tin can.