Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Learn about the complex mechanics that come into the creation of simple machines. Discussed in the pages of this book are the six types of simple machines - screw, inclined plane, wedge, pulley, lever, wheel and axle. There will be detailed explanation of how each of these machines are created, and used to make work easier. This educational book is ideal for third graders.