That it is an opera for children, that they enjoy it and that they can sing it, is proved by its more than twenty years of activity at the Children's Opera Prague (DOP). The ensemble of children and young singing soloists was founded in 1999 by Jiřina Marková-Krystlíková, a soloist at the National Theater Opera in Prague and a professor of singing at the Prague Conservatory. Children have performed many opera programs, often in Italian or German. Their CDs, with popular melodies and songs such as the Czech Christmas Mass by J.J. Ryba, Mozart's arias, songs from the mini-operas Svěrák and Uhlíř, but also Brundibar by Hans Krása and especially the whole cycle Opera is fun (also in the form of a TV series), are greatly sought after. Hans Krása's production Brundibár was also released on DVD.
With great success with audiences and critics alike appeared DOP in the Vienna Konzerthaus (2004), in the Japanese Aichi at EXPO 2005 and in Bayreuth in June 2005. With productions of Brundibar children celebrated success on the European opera days in Paris at the Opera Bastille, the Teatro Comunale in Bologna and Dortmund.