Take a picture on their first day of the school year, frame it and then take a picture on their last day of the school year holding the first picture ... I also love the idea of graduation day holding the first day of kindergarten!
Kindergarten Memory Book and Kindergarten Diploma (Diplomas)
Maybe a new tradition for every year??? A Day In My Life: Birthday Interview. I like that it's simple questions, like the handprint too. And this idea could be used for all ages - NOT just kindergarten!