Arqueólogos por accidente

Simple text and photographs introduce the purpose of money, how old coins and paper money are disposed of, and how new money is made.

Convi�rtete en un ingeniero experto y construye impresionantes obras de redstone con esta gu�a oficial de Minecraft. Aqu� aprender�s a usar los componentes de redstone, a montar circuitos funcionales y a levantar ingeniosas estructuras. Con informaci�n privilegiada por parte de los expertos de Mojang, �sta es la gu�a definitiva para las obras de ingenier�a de Minecraft. ENGLISH DESCRIPTION Learn the art of redstone and become a master engineer with Minecraft: Guide to Redstone, then put theory into practice to construct intricate contraptions in Minecraft. Pick up the basics...

Each year, Martin Luther King Jr. Day serves as a reminder of the life and work of one of America's greatest civil rights activists. In this informative book, readers will learn about the importance of the civil rights movement and why we celebrate Martin Luther King Jr. Day. Full-color photographs accompany the text. This essential book features accessible language that is ideal for children in the early stages of learning to read.

As they say, necessity is the mother of invention, and this book introduces readers to 14 women who invented very useful, helpful items. They include Chicago native Margaret Wilcox who invented the car heater, Indiana native Marion O'Brien Donovan who invented disposable diapers, Pennsylvania native Stephanie Kwolek who invented Kevlar, and Austria-born actress Hedy Lamar whose secret communications systems led to the creation of WiFi, Bluetooth, and GPS.