Stepan Kolchugin

Alyosha Ptitsyn, a third-grader decides that he wants to improve his personality and immediately starts to act.

Schoolboy Petya Ivanov receives a letter from a famous scientist and 20 grains of a new high-yield variety of wheat. Petya and his schoolmates decide to create an experimental plot. Fearing that adults will take the seeds away from them, the children do everything in secret.