When you arrive in the Poptropica blimp, you are right on top of it.
In the Museum of Olympus, there is one on the face of Poseidon's statue.
Right where you entered, to the right just above the Museum of Olympus on Main Street.
The offering for Poseidon is a starfish. There is one on the face of his statue in the Museum of Olympus.
you get a starfish from museum of olympus on posidens face
The gods are Ares, Hermes, Aphrodite, Artemis, and Hestia. They are all in the Olympus museum on Main Street.
The offering for Hades is the pomegranate from the Garden of the Sphinx. The offering for Poseidon is the starfishfrom his statue in the Museum of Olympus on Main Street.
ok so it's on the roof of the museum of olympus. that's where u have 2 go 2 get 2 the rope.
Swim through and use the starfish (from the Museum of Olympus) on the altar. There is no way to clean the graffiti off the Poseidon temple.
From the museum in Mythology island.
The mirror can return you to various realms you have visited on Mythology Island. You get it from Aphrodite by passing her test on the names of gods and goddesses. All of the names were in the Museum of Olympus. The five answers are : Ares, Hermes, Aphrodite, Artemis, and Hestia.
The offering for Hades is pomegranates, from the tree above the creature in the Garden of the Sphinx. The offering for Poseidon is the starfish from his statue in the Museum of Olympus.
To begin the island, you visit the Museum of Olympus, then go to the right to the Temple of Muses, where you will acquire a reed pipe (flute). Head back left of the Museum to the forest containing the Tree of Immortality. You must obtain the Golden Apple, which will begin your quest for the 5 Sacred Items of Olympus. (for a solution to the island, see the related question)