¿Por qué hibernan los animales? (Why Animals Hibernate)

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

Provides detailed instructions for experiments involving cells, the brain, the senses, breathing, circulation, and other areas of the human body.

Tommy Fuller and his family help a runaway slave family follow the stars in the Little Bear constellation to freedom.

Introduces things to eat and drink that are white, from rice to milk. The book ends with a recipe that a child can make with an adult's help.

El libro que explica a los niños qué es la constitución de una forma dinámica y asequible. Escrito por Javier Pérez Royo, jurista, experto en la constitución española y actual divulgador de la ley. «Constitución» es una palabra que todos conocemos. La hemos oído miles de veces, en la televisión, en la radio... Sabemos que es algo importante porque, a menudo, se habla de proteger la constitución, de respetarla o de preservarla. Pero ¿qué es la constitución? Si tuviéramos que explicárselo a un extraterrestre que viniera de visita, ¿qué le diríamos? Por medio de ejemplos...