Re: Nancy Drew: The Mystery of the Clue Bender Society Tips FAQ, Help Hints Cheat Cod
1st drum thing is in that Iron puzzle box.
2nd is in the symbol-locked door in the boiler room/red room/basement. (Once you get passed unlocking that dumb door, You have to touch these little red, blue, and green stars to get through the walls and into the storage room.)
So... where's the 3rd drum?