Bol'shaia kniga tain dlia mal'chikov - Mernikov A.G., Pirozhnik S.S.

Do you want to be known among your friends as a real connoisseur in the most important "boyish" questions? Then you need to understand some secrets, without which to surprise them, alas, will not work.
How can you stand up for yourself and still remain gallant and well-mannered? How does the lie detector work? How do you read an invisible message? How do I recharge my battery and restore CDs and DVDs? What is azimuth and how to calculate it? How to make a sketch? How do you make a compass, phone or watch with your own hands? And finally, what is the secret of the famous deductive method? "How hard!" you exclaim. And you'll be wrong! With this beautifully illustrated book, you can handle any challenges. She, having discovered all the "boyish" secrets, will help you to master a lot of useful skills.