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A funny story with picture puzzles based on the NUS 1-4 grade programme and helping to learn the Ukrainian language. The characters find themselves in an unusual summer camp, which is actually a secret laboratory. After passing the tests in search of a lost drone with a valuable cargo and making friends, the children melt the hearts of Professor Makaronchyk and his lab assistant, Porfiriy the Rat.

The author is a doctor of philology, children's writer.

For independent reading, as well as for use in the classroom in primary school.