You can't. They are only decoration, and in fact there is nothing functional in the entire building except Hercules.
in the hero's hut
he is in Hercs Hero Hut
Hercules is in the right corner of Hero's Hut on the Main Street of Mythology Island but he will not help you until you have collected all 5 sacred items and Zeus has stolen them.
He is in his snack bar, Herc's Hero Hut, on Main Street. But he is not interested in helping you until after Zeus gets the five sacred items.
On Mythology Island in Poptropica, you spend the drachma coins to purchase various items that help you progress through the island's quests and challenges. These include items such as armor, weapons, and tools that are essential for completing tasks and overcoming obstacles in the game.
In order to move the rock on Mythology Island in Poptropica, you need to find Hercules, who is located in the Hercules' Hero Hut area. Hercules will lend you his strength and help you move the rock.
You don't. There is nothing to buy in Herc's Hero Hut. You will spend it much later, to buy a bag of wind from Aeolus on Mount Olympus.
You don't need it and you can't get it. You don't need the pomegranate punch. Take the pomegranates from the tree in the Garden of the Sphinx and place them on the altar in Hades' temple, which will open the door to his realm. Except for getting Hercules to help you when the 5 sacred items are stolen by Zeus, nothing in Herc's Hero Hut has any function whatsoever in the quest.
Until he decides to help you, Hercules is in the same location for the entire game : selling autographs in Herc's Hero Hut (which has no function in the game whatsoever).
There is only one drachma. Get it from the guy in the underworld (Hades temple) for cleaning the graffiti. You will need it near the end of the game on the way to Mount Olympus. There is nothing to buy anywhere in the Hero Hut.
You don't. The only drachma on the island is the one earned for cleaning graffiti at the temple of Hades. It is used much later on the climb to Mount Olympus.*Except for talking to Hercules, nothing in Herc's Hero Hut has any function at all.
You don't. You can only earn one drachma, by cleaning graffiti at the Temple of Hades. You do not buy anything with it until you reach Mount Olympus. Nothing at Herc's Hero Hut is at all functional, and you don't buy his autographed likeness.