Presents the stories of a dog that helps stranded dolphins, a capuchin monkey who helps a young man with physical limitations, and a rat that sniffs out land mines.

Looks at the history of Ellis Island and identifies its early roles as a Mohegan island, fisherman rest spot, famous immigration station, and today's museum.

Discusses the different animals living in the city.

Discover the fascinating world of Mars in this colorful book packed with amazing imagery. In this inviting and entertaining format, kids will learn about the newest information on Mars, the Mars Rover, and our ongoing exploration of the Red Planet. This Level 3 reader is written in an easy-to-grasp style to encourage the scientists and explorers of tomorrow!

What was that? That's the roaring burp of a bullfrog! See that? That's the slick, shiny skin of colorful little rainforest frogs! Alive with froggy facts, this book has the coolest photos to bring kids deep into the swampy world of our amphibian amigos.

Ever since the first youngster in history had a pet, cats vs. dogs has been a hotly debated issue at recesses and lunch tables worldwide. Which one's better? Smarter? Desde que el primer hijo de la historia tenía una mascota, gatos vs perros ha sido un tema muy debatido en los recreos y mesas de almuerzo en todo el mundo. ¿Cuál es mejor? Más inteligente?