In a hole in the wall in the room to next to the Mirror Room.
In the Chandelier Room after doing the trick.
In the Clocktower Room after putting the Gear on the thing that makes the gears work, and flipping the switch.
In the Kitchen after doing the silverware trick.
In the Secret Cave in the room with the two Princess Pictures, after giving the flower to the picture on the left.
Under the rug in the first hallway.
