The main purpose of the books is to provide a planned and consistent development of the child's intelligence, logical and creative thinking in a playful way. The books contain labyrinths, crosswords, anagrams, mathematical problems, pyramids and chains, ciphers and codes, rebuses, quizzes and other games that will unobtrusively contribute to the development of erudition and intelligence of a schoolchild. Each page contains one or two tasks in game form. The tasks are divided into three sections according to the complexity of the tasks, at the end of the books there are answers to the tasks. The manuals stimulate the child's intellectual development, provide expansion of his horizons and consolidation of knowledge of English and Ukrainian languages, mathematics and the world around him. 128 pages 138x200 mm