How do you get the stone to move on Mythology Island?

First get all of the items, then go to the place to the left of main street and then there will be a cutscene where Zeus steals the items. Then go inside the building to the building in main street that has the sign that says Hercules is there. Hercules is on the right. Talk to him. Click the bottom speech bubble thing and he will help you get to Poseidon and Hades. Use the magic mirror from Aphrodite to get to they're places. If you don't have the mirror, then you have to go to Posidon's temple, to the right of Hades', and use the starfish that you will find on Poseidon's statue in the museum, and go inside. Go to the left and talk to Aphrodite. You will have to do a quiz where you have to name different gods. This is why I suggest that you click on all of the plaques under all of the statues.