The wishbone is an important symbol in Simpson's imagery. Drawing on the metaphorical meanings of the project's materials, Simpson uses III as an examination of, and meditation on, wishing. The set includes a wooden box filled with three contrasting wishbones, or "wishes," made from bronze, ceramic, and rubber. The bronze and rubber wishbones are unbreakably rigid. The ceramic wishbone was designed to be fragile, which was the artist's intention.