The Muppets are a group of puppet characters created by Jim Henson, many for the purpose of appearing on the children's television program Sesame Street. Henson's involvement in Sesame Street began when he and Joan Ganz Cooney, one of the creators of the show, met in the summer of 1968, at one of the show's five three-day curriculum planning seminars in Boston. Author Christopher Finch reported that director Jon Stone, who had worked with Henson previously, felt that if they could not bring him on board, they should "make do without puppets".