Tajna čarobnog napitka - Slučaj sumnjivog rasta

The most perfect military vehicle in the world was created in the Kinetic City, and it is controlled by the supercomputer Alek. A super crew of seven kids uses this powerful vehicle to learn, develop and help others. Traveling around the world, they solve various problems. And the problem is when you think you're short, so you spend your entire annual allowance on buying a magic potion to stimulate growth. And then at the beginning you grow a little, then nothing after that. Where's the magic in that? Our heroes are trying to find an answer to that question. The book also contains a chapter "Puzzles", where children can solve tasks based on word games, as well as a chapter about real facts related to the content of the book.