Vatslav Skraube

The boy Mitya is a real athlete: He is actively involved in sports and participates in all school sports competitions. One day he finds an apple that has fallen from a tree and eats it. Mitya had a severe stomach ache, and the boy imagined himself very tiny in his own body, where he met the evil Microbus.

Based on the eponymous novel by A.I. Herzen.