When Logan is four (and ¾) his Grandfather stayed with them for a few days to attend a funeral. Logan's mother, in one of her own oddly selective and mercurial attempts to protect him, tells him that Grandpa is going to a party to say goodbye to a friend. Four year old Logan doesn't take this explanation well. His Grandpa Leister is one of his favorite people (second only to his Mom). He plays with him and tells him stories and takes him with him when he goes places rather than handing him off to his Nanny. The thought that he would be attending someone else's party during the small amount of time he's in Logan's proximity (without Logan no less) leads Logan to sulk. And whine. And pout.
In an effort to avoid his behavior degenerating further into a full on temper tantrum (and catching the attention of Logan's father) his Mom asks Logan to help his Grandpa get ready. Logan's mood does improves slightly (especially once he realizes that helping Grandpa get ready doesn't involve make-up and jewelry like it does with his mom) but he is still pouting and his Grandfather does up the last of his buttons. Rather than getting mad, though, his Grandpa sits him down and tells him a story. One Logan has never heard before. It's a story about when his Grandpa fought in a war and was captured by bad guys. About daring escapes and, most of all, about the people that fought with his Grandpa and the people who helped him; about the man whose party he was going to and why his Grandpa needed to say goodbye to him. Afterwards Logan looks up at his Grandpa and thinks: that's who he wants to be when he grows up. Not a superhero, or a space-man or a cowboy. He wants to be his Grandpa.
Less than a year later its' his Grandfather who has a "party" and Logan is the one saying goodbye.