Mi Mundo (My World) Vehículos de emergencia

Una guía al mundo prehistórico de los dinosaurios con mapas, ilustraciones, texto, y extensiones gráficas.

There is a contest at a school to design a new playground. The students use blocks to build their models. As they build, they use three-dimensional shapes. Some students build a train out of blocks for the younger students to play on. Can you guess which three-dimensional shape they use for the train's wheels? Read to find out which design wins.

This complete Spanish translation of the highly acclaimed Isaac Asimov's 21st Century Library of the Universe is ideal for students still developing their English-language skills.

Qué es el Sol? El sol es una estrella, una bola de gases muy calientes. Es una fuente de vida, de calor y luz. Este libro es parte de la colección Altea Benjamín, la enciclopedia para responder a las preguntas de los niños que ya leen solos. ENGLISH DESCRIPTION How old is the Sun? What did humans think about the Sun in ancient times? How can sunbeams be trapped? Our most important source of life, light, and energy is just a ball of hot gas...! This book is full of information so amazing as the Sun itself.