The bush is so obvious that I figured it out when I was five years old the very first time I saw that bush, if you're too stupid to notice that it is completely out of place then I feel sorry for you.
The flute thing I'll give you though, and it's weird that there's not a single hint-giver in the game who mentions it at all.
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The Temple of Kraden, a forum for fans of Golden Sun:
http://z9.invisionfree.com/The_Temple_of_Kraden/index.php?act=site