You never do. It is not a game item, just a distraction.
There is no key to the chest and no way to open it. It is just a distraction.
(The actual item in the house is the gaudy painting on the second floor.)
The door to the Inspector's House
You will eventually receive a key. You cannot find it on the island.
The Dragon Face Lock
Recover the six pieces of the Dragon Face picture and use it to open the lock in the Underground that leads back into the Museum. Press the latch to open it.
*Feature positions*
Left (your left) horn : flat to left
Right horn : up to right
Left eyebrow : up to middle
Right eyebrow : over top of eye
Left eye : down and left
Right eye : up and right
Chin : halfway down below mouth
Tongue : all the way out
The Chest in the House
There is no key, and it does not open.
If you mean the supply room, all you do is tell the security guard you want to apply for the job. You have to go through the underground tunnel first. He will tell you to speak with the assistant curator. The assistant curator will tell you to replace 4 paintings back in their correct spots. Then you take 2 tests, and he gives you the KEY to the supply room.
You Don't Open It It's Just There So You Have To Look Around The House For The Real Item You Need To Continue On W/ The Game.
The chest on Counterfit Island is a decoy. You can't open it. What you need to do is peel back the painting on the upper level of the house and you will find a suprise.
You never do. There is no key. Instead, look at the painting on the 2nd floor.
There is no "vault" on Counterfeit Island.The Dragon Face LockAt night, secretly enter the museum by opening the Dragon Face lock in the Underground.The Black Widow's LairThe Key Card you recovered from the scooter chase will open the locked barrier.(see the two related questions)
You don't. Later in the game, you will receive a key to open the door of the cottage.
First, you have to find all the pieces of paper around counterfeit island. When the pictures are assembled together, it will show a picture of a dragon. Make sure the dragon on the door is the same as the dragon in the picture.
The curator of the Museum Fantastique summons you to Early Poptropica and gives you a key, which fits the cottage door.
you dont. go on the shelves beside it and climb. at the top there's an entrance to the vault.
I forget but I think the lady in the museum gives the key to you...
The art museum on counterfeit island opens after you go to the guy at the dock.
After you are in the Widow's lair, you can use it to open the final door to her trove of stolen art.
You get the Key Card after the scooter chase. You cannot use it until much later. Return to the museum to receive a package. In the Black Widow's lair, the guards are patrolling, but you can reach the locked door to her treasure vault (use the key card to open it).
you have to find the door that goes with it,( is the key to open the janitors closet that will help you in a time that you need it.)
What kind of sliding door?,,,,, Vehicle? House? Bank Vault?
The key card will open the door in the Black Widow's lair, once you get past the guards. (see related question)