1. Cut out all pieces.
2. Adhere the frame on the first scene piece.
3-4. Adhere front part on the back part.
5. Flip over the base. Insert the tabs of the 2d scene in the slots.
6. Insert the tabs of the 3d scene in the slots.
7. Insert the last tabs in the corresponding slots.
8. Flatten the box card and then adhere the tab to the box card side.
9. Adhere the side cover pieces to the both sides.