Experimentos sencillos sobre el tiempo

Introduces the concepts of short and tall, comparing some of the world's shortest and tallest animals.

Identify three-dimensional shapes all around the world in this Spanish-translated e-Book! Figuras en nuestro mundo (Shapes in Our World) gives readers practice identifying familiar shapes like cones, cylinders, pentagons, polygons, and prisms, while familiarizing them with STEM themes and more advanced geometry concepts. Children will learn more about vertices, symmetry, and bases. With each shape, this book gives readers information about an example of the shape, be it a building, a honeycomb, or a tree trunk! With an accessible glossary, clear mathematical diagrams, practical examples, and...

Explores snakes and describes how they move, hunt, eat and mate. Includes fact boxes with information about snake life.

"Dino" Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children's books, writes a popular dinosaur column in Highlights magazine, and was an adviser for the film Jurassic Park. Take a trip through dinosaur time to meet these deadly dinosaurs face-to-face: The Variraptor had pointy teeth with grooves like steak knives to saw through meat! The Draeomaeosaurus was the first raptor ever discovered. It had a very large brain! The Microraptor was ...