Method 1 works best with larger white, red or slash pine cones.
Soak pine cones outside in a large bucket of water overnight which causes them to close and will remove any bugs.
After cones are closed insert them between lower and upper rings of the wire frame. (Be sure to wear gloves as the pine tar is very hard to get off your hands)
When frame is filled with the desired amount of cones, hang in a warm, sunny spot for a few days. As the cones dry, they will re-open and are set in the frame.
Spray with acrylic sealer and decorate as you wish.