Popular science film for children about the structure and operation of a computer. The film stars: Tanya Zagryazhskaya, Y. Chernov, S. Andropova. The film uses computer animation. The film is dubbed by a song to the words of P. Filimonov. Moscow city in winter. Trolleybus and pedestrian traffic. Passengers on the trolleybus, including a little girl. One of the passengers is carrying a Christmas tree. People on the street, near the Rechnoy Vokzal metro station. Sale of flowers. New Year tree on the street. Elderly women trade "by hand". There is a young man with a sign "Buy vouchers". An elderly man with a bushy beard and a stick walks in the crowd. The woman and the girl run to the kindergarten. Signboard and building of kindergarten №189. The premises of one of the scientific institutions. Employees of the institution at the computers. The girl draws, sitting on the floor, plays at the computer. Schoolchildren at computers.