You cannot get the key for the cage until you have formulated an antidote to Count Bram's vampirism.
-- Take the crossbow outside the castle, right from the moat, and you will find a wall. Shoot arrows into it and climb up to find the mandrake root.
-- In the library, roll the loose cannonball to the fireplace. When it is hot, use the fireplace Poker (rod) to shove it left into the dumbwaiter (throw the handle with the red knob). Go back to the laboratory and throw the lever there, and the hot cannonball will wilt the wolfsbane.
-- Get the garlic from the shelf and you have all three ingredients. Look through the microscope and click the dropper to pick up drops of each: 1 mandrake, 3 wolfsbane, 3 garlic. Add to the cells and you have the anti-vampirism serum.
Now when you go to the cage room, there is a silver cane in the umbrella stand at the right. Use it to retrieve the key.
We can get the key in vampires curse island with the help of the hook on the right side of it.
look in items bag and "press"use crowbar
search for poptropica secrets and you well find a video walkthrow and a written walkthrow.
you have to click on the cane, you will find it next to the umbrella in the corner sparkling :P
you jump on the up diagonally onto the bed and on to the cage but you need the key which is in the gate on the bottom right
After you make the Serum, go to the room in which Katya is locked. in the bottom right corner, click on the silver cane to take the key out of the bars.
You will see a wand in the umbrella holder... click on it and grab the key with it... Good luck :)
You jump up to the left and jump on the bed then you jump onto the cage, don't forget to talk to Katya, or if you have the key, click the lock.
When you have lit the fire and all the chandeliers, there will be a glass eye on the floor. Put it back in the tiger head to get a key.
u find the root and find the forula and there is a shiny cane where the key is.
find an eye , put it in the eyeless tigers hole, and a key falls out. use it to unlock the amory
Above one of the bookshelves is a lion and the lion has only one eye. Put the glass eye on the lion and the key will come out of the lion's mouth.