It was during the 1930s, about the same time as trick-or-treating, that Halloween-themed haunted houses first began to appear in America. It was in the late 1950s that haunted houses as a major attraction began to appear, focusing first on California. Sponsored by the Children's Health Home Junior Auxiliary, the San Mateo Haunted House opened in 1957. The San Bernardino Assistance League Haunted House opened in 1958. Home haunts began appearing across the country during 1962 and 1963. In 1964, the San Manteo Haunted House opened, as well as the Children's Museum Haunted House in Indianapolis.