I spent three days last December in a warehouse off Shirley Street, watching the Valley Boys paste crepe paper onto a frame that would never survive the morning. Marcus Rolle, the group's head designer, had been awake for thirty-one hours. His hands were stained electric pink from the glue dye. "We don't keep costumes," he told me, not looking up from the wire armature he was bending into a twelve-foot crown. "The parade is the museum. After that, it's just paper."

What the tourists never see

The work begins in September, not December. Each "group" — the Saxons, Valley Boys, One Family, the Roots — operates like a cross between a theatre company and a construction crew. They lease warehouse space, commission brass cowbells from local metalworkers, and source hundreds of rolls of crepe paper in colors so saturated they look wet. The costumes aren't sewn. They're built over welded steel and chicken-wire frames, layered with paste until the surface reads as solid. One headpiece I measured was four point two metres tall and weighed sixty-three pounds.

"The parade is the museum. After that, it's just paper and wire and a story your muscles remember."

At 2 a.m. on Boxing Day, the groups roll their floats to the Bay Street staging area. The judges stand in wooden towers above the intersection of Bay and Charlotte. Scoring is split into costume, music, and choreography — each worth equal weight. A group that wins costume but fumbles the dance steps will lose to a group with simpler outfits and tighter rhythm. The cowbells ring constantly, a low metallic heartbeat that you feel in your sternum before you hear it with your ears.