The hero - an absent-minded person from Basseinaya Street - goes not to Moscow, but to the opening of a children's railway. The pioneers invite him there. And this time the character finds himself in a lot of funny situations along the way. However, he still manages to open the railway. The picture ends with a march performed by schoolchildren.
| Actor | Role |
|---|---|
 Viktor Koltsovчеловек рассеянный | человек рассеянный |
 Nina StravinskayaVera Nikolaevna | Vera Nikolaevna |
 Viktor Seleznyovмалыш | малыш |
 Konstantin Alekseevпассажир трамвая | пассажир трамвая |
 M. Skavronskayaпассажирка трамвая с больным зубом | пассажирка трамвая с больным зубом |
 Maria KlyucharevaCar washer | Car washer |
| KKolya SkvortsovNot listed | Not listed |