I am happy, my granddaughter, to see you well with life, grown and prepared for the great stage that is adolescence. Congratulations on reaching this wonderful, beautiful debutante age!
It seems impossible, but it is not: fifteen years of existence. When you were born it seems that this world smiled and never stopped. I happen to feel like yesterday, you know, honey? How fast it went all this time!
Now you have only one mission: to be happy. Today, and every day of your life. Run after what brings you peace, don't give up until you reach your dreams and goals. Oh, and do not fear adolescence. It's just a beautiful page of the book of your life. Happy Birthday darling!