On each end rim, at center, make a pencil dot to indicate the middle top of each box end. (Leave sides without marks.)
From the center top point on each end cut down diagonally to right and left, to form the peaked part of the building under the roof. (See [Diagram Three, CC], page 170.)
Then, cut the long sides of the box to meet these, lengthwise. Remove the cardboard at the top of each long side.
Now, in the point at one end of the lower half of the greenhouse building, cut out windows. Cut them to fit your box building. (See [Diagram One], A, page 166, for windows.) Back of each, paste some transparent waxed sandwich paper. If you like, cut a triangular window in the point of the building which is to be under the roof.
Between the lower two windows, cut a door to fit—one inch wide and two inches high should be a good size. (For cutting a door, see [Diagram Two, A], page 167.)
You may make the roof two inches longer and four inches wider than the size of the base of your box. Cut this roof from your cardboard. Fold it through the center of its long sides to make a gable roof. (See [Diagram Three, C], page 170.)
In each side of this roof, cut out windows. Paste back of their openings some waxed sandwich paper.
Glue the roof to the lower half of the building.
Any small boxes that you have will form flower-boxes when filled with small artificial flowers. They may go into the greenhouse.
To make the pergola, you will need the lower half of a white shoe-box. Take the box and stand it upon its rims, base at top, opening below.