For me, this song is about growing up. I'm almost 19, and entering a very tumultuous time of my life as I fight between staying young and becoming an adult. As a child I was very imaginative and enjoyed the Chronicles of Narnia very much. Then, and even now, I sometimes had trouble with the line between reality and the things I imagined to be true. This song reassures me that just because I'm growing older doesn't mean that I have to leave the happiness of childhood behind. I can come back whenever I want.