For my children's wonderful dad we divided out the number sixty between the number of children and myself and each wrote that number of qualities and examples with dad doing this. We each read them to him at b-day celebration. There a many variations of this one can do. A jar filled with divided out number saying 'thank you' for something. You know, things he may have forgotten like, "Thanks, Dad for not falling for my tears when you were drilling me in my multiplication tables and I felt you were being to hard. Thank you for teaching me with that to use my brain, give it my all, and not rely on drama or manipulation to get out of an unpleasant task with unpleasant people." Sixty days in the jar to hear thank you, Dad or thank you, Friend or thank you, Honey. Then of course, you could always pop out of a cake for his present
(Oh, and how I got on hubby's case for making her cry and he was discouraging her from liking math!)