A fantastic little tale. Fitzgerald wrote this as a reaction to the Mark Twain remark, and here is what he got to: growing younger is pretty much the same as growing older.(view spoiler)[
Benjamin's born frail and slow moving, feeling very close to his grandfather when a "baby", has trouble hanging out with other kids, has trouble getting to university, falls in love for a "younger" woman, is finally at ease with his father when they are about the same "age", feels uninterested as his wife grows older, finnally goes to university and then school, has "teen" problems dealing with his son, plays around with his grandson and finally his little world goes smaller and more and more peaceful as the memories of his life fade away in his baby brain... (hide spoiler)]
Why so many whining on the comments? Are people really expecting a literally realistic take on such a bizarre concept? That would be awful. As a tale, it works lovely.