Discover motion and machines in a fun and inspiring way with this set! Written in Spanish, each 32-page book features high-interest nonfiction text, lab activity, sidebars, photographs, and supporting graphics. Titles include: Bicicletas y tablas (Bikes and Boards), Cómo funcionan los juguetes (How Toys Work), Cómo funcionan los parques de diversiones (How Amusement Parks Work), La búsqueda de la velocidad: Los vehículos (The Quest for Speed: Vehicles), and La búsqueda de lo mejor personal: Los deportes individuales (The Quest for Personal Best: Individual Sports).