Un día en el zoológico (Day at the Zoo) (Spanish Version)

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.

A community center has many exciting activities to choose from. You can play games, swim, and even learn how to cook there. As you read, you can compare the size of a tennis racket to a ping pong racket, use cubes to measure the world's smallest snake, and even use feet to measure the length of a basketball court. What would you use to measure a snake?

Presents information about super jumbo jets, looking at the history and development of jets, discussing various aspects of design and construction, and exploring different types of jets, including the Concorde and the Airbus A380.

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.

Introduces the concept of opposites through pictures of a girl named Laura as she takes part in common daily activities.

Esta vez Lyna se enfrentará a una rival hecha exactamente a su imagen y semejanza, alguien que quiere acabar con ella. ¿Podrá con ella? Lyna está disfrutando muy tranquila de unos días en Tembleque, junto a su Meli, la abuela Rita y Dani, sin saber que un peligro la acecha. Desde un universo paralelo, llega al pueblo un extraño personaje que quiere ocupar su lugar y eliminarla para siempre. ¿Podrán descubrir el peligro a tiempo? ¿Lyna será capaz de derrotar a su rival o desaparecerá de este universo? Acompaña a tus personajes favoritos en esta intrigante aventura.