For the "Festival of good ideas" that is to take place in their residential quarter the musically enthusiastic young Bum wants to rehearse a music show along with his friends. With pans, cans, hooters and other junk they make music. Some adults get angry about that. Others like the second-hand dealer Dohlenei and Mr. Kling from the symphony orchestra help the children to make their fantastic idea come true.
| Actor | Role |
|---|---|
| TTobias UnterbergBum | Bum |
| JJörg LehmannPaule | Paule |
| RRonny SchreiberPlautz | Plautz |
| MMirka TumaKnobel | Knobel |
 Jaecki SchwarzHerr Kling | Herr Kling |
 Marga LegalFrau Bolz | Frau Bolz |
| GGrit MühlsteinAnett | Anett |
| SSandra LampeJaecki | Jaecki |
 Wolfgang GreeseOttmar Dohlenei | Ottmar Dohlenei |
 Ilse VoigtOma Taubert | Oma Taubert |
 Iris BohnauNot listed | Not listed |
| DDieter JägerNot listed | Not listed |
| EElse KorénNot listed | Not listed |
 Arnim MühlstädtNot listed | Not listed |
 Marianne WünscherNot listed | Not listed |
 Peter HladikNot listed | Not listed |
| JJürgen HuthNot listed | Not listed |
 Gerd StaigerNot listed | Not listed |
| EEva SchäferNot listed | Not listed |