only the Minotaur's door needs a song. Hadies and Posiedon need you to give them something in the offering alter
Rhea
you can not get the cat away from the door on poptropica you have to jump over it
You have to look on the door leading to the Minotaur's labyrinth, and you will see a circle with colors and numbers on each sliver of color. Play your flute in front of the door in that particular order. I hope this helps you.
Poseidon's symbol is the Trident.
so the little color marks with the numbers on them, they are a song pattern for your reed pipe. when you play the tune, the door opends and the minotaur is in there and you can get into the labyrinth
you have to jump
you can find it in early poptropica
you open the door of the ship in poptrpoica
plankton (I'm guessing)
poseidens son
In Greek myth, it is with Poseidon.
He had different symbols, but one of them was a trident