Bella Alten operatic career included six Metropolitan premiere performances – Adele in Die Fledermaus (1905), Gretel in Hänsel und Gretel (1905), Saffi in Der Zigeunerbaron (1906), Olga in Fedora (1906), Columbina in Le Donne Curiose (1912), and Lisetta in L'amore Medico (1914). In November 1905 when she sang Gretel in the premiere Metropolitan performance of Hänsel und Gretel, the composer Engelbert Humperdinck was in the audience. This opera received 11 performances that first season and was selected by Theodore Roosevelt's wife as a benefit for the Legal Aid Society. Alten sang Gretel in this opera every season she was with the Met
Hansel and Gretel: An Opera Fantasy called "kinemans". The bodies of the kinemins were sculpted in clay by James Summers and cast in foam latex by George Butler. Summers also did the paint job and their "makeup. The puppets were one-third life-size and cost $2,500 apiece to build. The Witch was re-named Rosina Rubylips. This is different from the original opera, where the witch tells Hansel that her name is Rosine Leckermaul (translated as Rosina Tastymuzzle). The mother and father figures were sculpted to resemble Mildred Dunnock ("Death of a Salesman") and Frank Rogier, who supplied their voices. After production, the Hansel & Gretel sets were