Well I havn't played it for a while but if there are four kids, one is behind a bush near where you started, one is behind the gravestone that Tott (the guy with the rainbow on his shirt) dances in front of, one is behind the bomb shop (get there by walking around on the left side) and the leader/one with the hat is on top of this massive tree near the red post box, you get him off by rolling into the tree.
Find all eight triforce pieces and return to Hyrule (find Tingle on Windfall).
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A person can find a detailed walkthrough for The Legend of Zelda: Wind Waker at several different places. Some of these places include GameStop, Zelda Universe, and Game Spy.
You can find a detailed walkthrough that'll help you with that on gamefaqs.com
Just off one of the islands where you deposit the orbs.
The Bokoblins in Zelda: The Wind Walker have their habitat in the Forsaken Fortress. However, they can go anywhere.
In The Legend of Zelda: The Wind Waker, you can find a tornado after playing the Earth God's Lyric on the Wind God's Aria near the Mother & Child Isles. The tornado will take you to the Tower of the Gods.
you have to find seeds of fire
She says she works on Dragonroost but really you can not find her
just look around until you find a fancy looking chest
The Triforce shards are hidden in the ocean. To find them you must have the Triforce Charts which will tell you where to find them in the ocean. When you have a chart and find the specific area it asks you to find, you can then reach into the ocean and retrieve it. Here is a very informative guide to finding all eight Triforce shards: http://www.gamefaqs.com/gamecube/469050-the-legend-of-zelda-the-wind-waker/faqs/42707