The topics chosen for this book are inspired by the studies of Alan J. Bishop, so there are six universal activities that characterise mathematics: Counting, Locating, Measuring, Designing, Playing & Explaining. The ability developed in this activity book is Reasoning: curiosity about the surrounding world is stimulated, the most complex mental categories are broadened (cause and effect relationship), problem solving, first arithmetic skills, logic, space and time skills, planning and coding are practiced. Ages: 7 to 9