Dear _________,
During my graduation ceremony it was so wonderful to look up into the crowd and see you sitting there smiling and supporting me. That was such an important day for me, and I’m so glad you were there to share it. Thank you also for the handsome picture frame. I will select a great family picture taken on graduation day, and take it to my new job so it can grace the desk in my office.
Thanks again,
(YOUR NAME HERE)