An engineering set for a young constructor from the age of 3. The set consists of a foldable suitcase, gears, blocks and tools. When unfolded, the suitcase serves as a base for screwing on the gear wheels. The child's task is to arrange the gears in such a way as to create a system of gears driven by one element. The child will learn the principles of mechanics and develop cause-and-effect thinking . The gears are screwed to the base with the tools included in the set: a screwdriver and a wrench.