Yo,when you get the rod of Seasons go to Horon Village and go to the pits and use the feather to get to the lake.
Then go to the otherside and stand on the stump andturn the season into summer,then go to the small pool,notice that the water had dried up.
Walkup and you'll find a rock,use the powerbracelet to lift the rock and you'll find a secret path.Go in it and keep going down until you reach the bottom.
Warning:watch out,there are shooting arrows.Doge the arrows till you get to a treasure chest.open it and get a heartpiece.
We have more cheats and tips for this game here, Frogger's Adventure: Temple of the Frog cheats
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