A Father's Voice in Fortune Cookies

I was at my sister's graduation last week (congratulations to her!). Sitting in front of me was a women going through a series of 3x5 cards, each written differently with what appeared to be a different message, none of which I was able to read... but I had a great idea....leave personal thoughts, ideas and notes for my sons....to give them when they venture out on their own with instructions to open the envelope and read one occasionally.