I handled the rest of the creation of the helmet prop, first attaching and securing the adjustable construction helmet to the wire form, then building on layers of newspaper papier-mâché, wood glue, dry wall compound and multiple coats of acrylic paint.
The antennae was created using a modified paper bubble-tea straw with a crushed ball of aluminum foil glued to the tip. It was coated in tape, painted and secured to the helmet under the layers of dry-wall compound.