Taylor actually used the words from a blog written by the little boy's mother... the boy was four.

More background and links to the blog:

http://well.blogs.nytimes.com/2012/09/17/a-childs-cancer-story-inspires-taylor-swift/

http://www.mamamia.com.au/parenting/taylor-swift/

I think all the time about what I would do if something happened to our kids... it is just unbearable to think about. This song almost made me cry...

Here are the opening lyrics:

I remember your bare feet,
Down the hallway,
I remember your little laugh,
Race cars on the kitchen floor,
Plastic dinosaurs
I love you to the moon and back

Definitely worth a listen... just don't watch it at work or you may start crying!