Fabulous Five Froggish Tenors

In The Legend of Zelda: Ocarina of Time, there are five frogs that can be located underneath Zora River. By standing on a protruding log and playing the Ocarina, the frogs start croaking to your tune. A successful tune engages a sudden growth spurt and you are awarded with 50 rupees. A mini-game is triggered where the player must follow the tune which the frogs play, in order to make them leap to catch the butterflies suspended above their heads. The reward is a Heart Piece.