The seventh box can be found if in the corridor with the wall clock of the Butler go through the crack located between the table and the nightstand. Follow it and you will notice that an opening has opened in the wall. Going down the elevator, you need to get out of it and open the chest, from which Nome will jump out. To find the fifth box, in the doll workshop, after the Girl in the Yellow Raincoat and two Nomes fall under the floor, you need to run after them, and then go into the room. It can be accessed by climbing on the shelf leading to the gap between the barrels and boxes. The fourth box 'is in a room located in a room with large barrels. In the wall you will find a gap that leads to the room with the third box. In the hallway with some Eyes you need to climb up and go to the left. This gap is in the same room where the Craftsman takes one of the caged kids when the Girl in the Yellow Raincoat walks across the shelf. The second box is in a secret room, which can be accessed through a gap in the wall. Parallel to them are wooden planks on which the item you need stands. The first box can be seen quite easily when the heroine at the very beginning of the game walks on wooden beams.
When opened, puppets on a spring will jump out of them.
The boxes look like regular wooden 'Jack-in-the-box' toys.