ONCE UPON A TIME Extends at Second Generation Theatre and Theatre of Youth ONCE UPON A TIME marked the first collaboration between TOY & SGT as well as the first foray into “interactive digital theatre” for both. by BWW News Desk Second Generation Theatre and Theatre of Youth collaborated to bring to life ONCE UPON A TIME: An Interactive Digital Musical for children. After an extended initial run, the companies have decided to add 4 performances in April and May. ONCE UPON A TIME marked the first collaboration between TOY & SGT as well as the first foray into "interactive digital theatre" for both.