I actually discovered Knock Knock stuff by Googling "fart gifts" for my siblings. But then I found all these other amazing gifts and listy note-type items that are just the right balance of heart-felt and hilarious without being sappy or obnoxious. I got this for my dad (and my mom for the Mom version) for an early 80th birthday celebration for both of them because my siblings and I were all going to be together with my parents, who are turning 80 in October & December respectively. My dad was wowed by the personal expressions of love and specific references to memories and "inside jokes" we have. You could not get a better Dad gift than this. Not even golf clubs or ties or whatever the kids are giving fathers these days. I filled it out in one sitting because all the answers to fill in just came to me. What's nice too, it's not all on your shoulders to think of *everything*, but the fill-in-the-blank structure helps bring out the specific and creative as it prompts immediate personal descriptions and occasions as you see the words.