Photos and text show what life is like inside a spaceship and explain how astronauts train for their work.

A bilingual introduction to hands, what they are used for, and how to take care of them.

Pedro the penguin has a good time playing on land with his fellow birds and learning how to swim in the sea.

Two siblings compare the sizes of things they are familiar with, from the buses they ride to the beds they sleep inches.

A girl describes how she spent a summer observing the bats around and inside her house and what she discovered about their characteristics and behavior.

Fly Guy is flying to the natural history museum. Go with him and learn many things about dinosaurs! Hombre Mosca está volando por el museo de historia natural. ¡Accompáñalo y aprende muchas cosas sobre los dinosaurios!

A simple introduction to the life cycle and functions of a leaf.