A schoolboy Petya is working on inventing space elevator, super-technological kitchen and a lot of other things.
| Actor | Role |
|---|---|
 Andrei FilimonovPetya | Petya |
 Yelena RyabukhinaLyusya | Lyusya |
 Vladimir BalonNot listed | Not listed |
 Yuri GorobetsNot listed | Not listed |
 Boris ZajdenbergNot listed | Not listed |
| YYuri GorobetsNot listed | Not listed |