The first of September. One of the streets of the city of Tashkent. Children go to school. 183rd Moscow school. Guys laying flowers at the memorial plaque of sixteen students graduated from this school and died a heroic death in the Great Patriotic War. Dogs Belka and arrow on board the spacecraft. Scientists study animals after their return. Cuba. City of Havana. Children traded on the streets, a boy shining shoes. Crimea. Nikita Botanical Garden. Pioneers help botanists to care for flowers and plants. Children harvest grapes. The town of Narva. Members of the club of young seamen Urban House pioneers learn to knit knots, sailing in a boat on a river.