Russian composer Cesar Antonovich Cui (1835-1918) composed 4 children's operas. They were meant not only for children to enjoy as an audience, but also for children to sing the solo and choral roles. Here are the titles and years of composition: "Снежный богатырь" ("The Snow Bogatyr'") (1905) Красная шапочка (Little Red Riding-Hood) (1911) "Иванушка-дурачек" ("Ivan the Fool") (1913) "Кот в сапогах " ("Puss-in-Boots") (1913) This playlist of YouTube videos (as of Apr. 26, 2019) includes all four operas, in the same order as above, with one recording each, except for the two for "Puss-in-Boots," the first of which lacks the overture/introduction, and the second of which is sung in German with audio only. The performances are not necessarily complete, and in many cases adults are singing solo roles. You can download PDFs of the original printed piano-vocal scores of all of these operas from IMSLP: imslp.org/wiki/Category:Cui%2C_C%C3%A9sar_Antonovi…