In all honesty, I have not grown out of any of my childhood interests..... Or those in my teenage years as well, I may from time to time keep them hidden from people, but I still love my Redwall novels (I have all 23 of them, plus the extras), tv shows from when I was a child, like Transformers, Voltron, The Sooty and Sweep Show.
Always loved sports and I still do.... Music has changed, kind of, I still like the same music as I did 20 years ago, but just my horizons have broadened and have accepted different styles of music into my life.
I guess I will always be a big kid at heart..... I may get older, but I will never grow up
My older brother used to like ketchup on cereal.......