This book is meant for children 6-7 years old. It can be used as preparation for elementary school, as well as a supplement to a regular school curriculum. This book does not repeat, but supplements and expands traditional school programs. It does so not by increasing the number range, but through a wide range of interesting problems that help the child feel more comfortable in navigating the world of numbers and mathematical concepts. The tasks in this book exercise logical thinking; explain such mathematical concepts as greater than/less than, counting order, etc., in a child-friendly manner teach children to recognize the number of objects in a group by sight, without counting them one by one introduce children to symmetry, the concept of coordinates (by recognizing “apartment addresses” in a multi-story building).