Focuses and entertainment

How to hit all unique memory and without peeping to list dozens of six -digit numbers? How to twist a confused knot and untie it with one movement of the hand? How to draw a complex image without tearing a pencil from paper? And how do four deuces write the number 111?
This book contains dozens of exciting puzzles, puzzles and tricks from various fields: arithmetic, geometry, and even physicists. You will learn how with the help of improvised objects - paper, scissors, pencils - help the child develop memory, quick wits and skills of account, and you can also have fun with him for free time. Instructions for all tricks and puzzles are written in simple language and complemented by explanatory schemes, and detailed answers are collected at the end.
The book will appeal to both children and parents who are engaged with them on their own