Two ballerinas performing in San Diego Junior Theatre's production of Birthday of the Infanta, an 1891 Oscar Wilde fairytale. In 1922 it was adapted by Austrian composer Alexander von Zemlinsky to an opera, Der Zwerg (The Dwarf), with libretto by Georg Klaren. Established in 1948 in Balboa Park, San Diego Junior Theatre is the oldest youth theatre program in the United States, producing shows acted and crewed by children ages 8-18. Birthday of the Infanta was performed in 1956 and 1968.