可以变形为：in every human being's heart,there is the lure of wonders,the unfailing childlike appetite of what's next and the joy of the game of living.
in every human being's heart 是状语,
there is 是there be 句型的引导词,the lure of wonders,the unfailing childlike appetite of what's next and the joy of the game of living.是三条内容并列而成的主语.
主语中of what's next 是 childlike appetite的同位语从句.