Do this with both boxes. Spray paint silver, let dry. Cut open ends off or fold inside box. Follow above instructions for large box, then cut holes for arms. Glue lids on box in front, along bottom as control knobs.
Paint face silver.
Fold sides of box in on both ends. Attach yarn to go from front of box to back of box and rest over child's shoulders. To attach, poke holes with a pen or screwdriver into the box, then run yarn through and tie off. Spray paint box red. Spray paint the paper plates black.