Draw a pumpkin outline on one side of a cardboard box.
Carefully cut out the pumpkin with the box cutter.
Trace the first pumpkin cutout to make matching pair.
Measure to the center on each pumpkin cutout and draw slits. One should go from the center to the bottom, the other from the center to the top. Trim as needed so the two pieces fit together.
Spray paint the cutouts orange. Repeat with multiple coats as necessary to cover both sides.
Hand-paint the pumpkin stems brown using the sponge brush.
Make green vines by painting the twist-ties green on both sides. When dry, bend them to shape and stick them into the pumpkin stems.
Assemble each pumpkin by lining up the slits in each pair and fitting them together in a cross.