I lived in Briarwood Queens until I was 4 years old and went several times to the World's Fair in Flushing Meadows Park! I was 3, just like you. My parents would always ask me what I wanted to do when we were there. My answer was always the same "Small World."
My husband sometimes thinks I am a Disney nut, but IASW is so nostalgic for me. I remember the magic and it is awesome. I know they are updating IASW now, but I hope they don't change it too much. I brought my kids to Disney young, because I wanted them to grow up with the same feeling.