How I Capture a Year in my Boys' Lives

Every year on the boys' birthdays I take all the random iPhone videos and school performances and milestone moments I've taken from the previous year and create a montage. I've done it since both boys were born because I decided the chance of me reviewing all the random video files scattered here and yonder is slim as the years go by. However, sitting down and watching a couple minutes for each year is easy. I LOVE going back each year and watching how they've grown.... and by love I mean I cry my eyes out. 

Do you do anything special each year on your child's birthday?