Calvin Black (1903–1972) was an American folk artist known for carving large dolls out of wood, with which he performed as a roadside attraction in California, called Possum Trot.

He performed alongside the dolls in his hand-constructed "Bird Cage Theater" on the Possum Trot grounds.

Outside the theater, Black constructed larger dolls that were animated using wind power to attract tourist attention.

In 1977, filmmakers Allie Light and Irving Saraf released the documentary Possum Trot: The Life and Work of Calvin Black with a grant from the National Endowment for the Arts; the film included interview footage of Ruby and audio from an earlier interview with Calvin.

Ruby Black died in 1980, and the collection, including not just the dolls but also hand-painted signs and other paraphernalia, quickly ended up in collectors' hands.