Decoration

In The Legend of Zelda: The Wind Waker, decorations are small objects, usually statues or flags, that Link can put around Windfall Island and certain other islands. They are obtained by trading with the Traveling Merchants, and then buying the traded item from Zunari. Most decorations serve no purpose, but a few, like the Big Sale Flag will help Link in subtle ways. Put them everywhere on Windfall Island to get a Piece of Heart.

Flowers
The Town Flower is the first item in the Island Trading Sequence of The Wind Waker. Link receives this from Zunari in his shop. The Town Flower is the most basic of the Island Trading Sequence items.

The Sea Flower is the second item in the Island Trading Sequence. It is received by trading the Town Flower with the Traveling Merchant on either Bomb Island or Mother and Child Isles, along with a fee of 20 Rupees.

The Exotic Flower is the third item in the Island Trading Sequence in The Wind Waker. It is received by trading the Sea Flower to the Traveling Merchant on Greatfish Isle, together with a fee of 25 Rupees.

Flags
The Pinwheel is the fourth item in the Island Trading Sequence. It is received by trading the Exotic Flower with the Traveling Merchant on Mother and Child Isles.

The Sickle Moon Flag is the fifth item in the Island Trading Sequence. It is received by trading the Pinwheel with the Traveling Merchant on Bomb Island.

The Big Catch Flag is the sixth item in the Island Trading Sequence. It is received by trading the Sickle Moon Flag with the Traveling Merchant on Mother and Child Isles.

The Big Sale Flag is the ninth item in the Island Trading Sequence. It is received by trading the Skull Tower Idol with the Traveling Merchant on Mother and Child Isles.

The Hero's Flag is the tenth item in the Island Trading Sequence. It is received by trading the Big Sale Flag with the Traveling Merchant on Bomb Island.

Statues
The Fountain Idol is a small statue of a woman near a water source, and is the seventh item in the Island Trading Sequence. It is received by trading the Big Catch Flag with the Traveling Merchant on Bomb Island.

The Skull Tower Idol is the eighth item in the Island Trading Sequence. It is received by trading the Fountain Idol with the Traveling Merchant on Greatfish Isle.

The Postman Statue is a item used in the Island Trading Sequence, by trading the Hero's Flag with the Goron Merchant on Greatfish Isle. Afterwards, Zunari sells these in his shop.

The Shop Guru Statue is a golden statue of Zunari on top of a pillar. This is greatly desired by the Goron Merchant on Greatfish Isle, and if Link trades it to him as part of the Island Trading Sequence, the Goron will give him a Heart Piece.

Trivia

 * The top skull of the Skull Tower Idol has a resemblance to a Bubble in its depiction in Ocarina of Time, Majora's Mask, and Twilight Princess.