At Early Poptropica Island
On Early Poptropica. You deal with her assistant curator until after the Scooter Chase, where you get a message to meet her on the other island. Go there by blimp and meet her in the Pop Art Museum.
On Counterfeit Island, the curator of the Museum Fantastique summons you to meet her on Early Poptropica (an extraordinary inclusion for Poptropica). Take the blimp to the other island, and enter the Pop Art Museum there. After meeting the curator, return to Counterfeit Island to continue the quest.
The curator is in the Web Browser cafe when you emerge from the lair, but you have to meet her in the museum to receive your Island Medallion.
You go in the blimp. *Ordinarily, you would be leaving the island, but on Counterfeit Island, there is a special link that lets you go to the other island and meet the curator at the Pop Art museum. Although you could play Early Poptropica while you are there, it could create conflicts with Counterfeit Island. See the curator and return to Counterfeit Island again on the blimp.
Once you have beaten the Black Widow, you meet the curator at the Internet Cafe, where one entrance to the lair was hidden. Go back to the Museum Fantastique where she will award you the Island Medallion.
All you do is enter the Pop Art Museum and meet the curator at the bottom left inside. Then you go back to Counterfeit island to finish the quest.
Talk to the Curator in the Web Browser cafe, then meet her in the expressionism wing at the museum to get your island Medallion.
The assistant curator will give you a painting with a message saying someone wants to meet you at the museum. Its the curator gives you the key to the house in the countryside.
She is the curator of Museum Fantastique and she is in the Pop Art museum. Go to the lower left inside. (Note that she is only there where you travel to Early Poptropica as part of the quest on Counterfeit island.)
She sees you at the Web Browser Cafe, which is above the Black Widow's lair, and you should meet her back at the museum to get your Island Medallion.
It is unique in Poptropica, but yes, that's what you do. Meet the curator of Museum Fantastique in the Pop Art Museum in Early Poptropica.
After you chase the thief on the scooters, you can go to Early Poptropica, where the Curator will meet you in the Pop Art museum to give you the key. (You get a package at the museum with this message.)