Heather Kissock

Did you know that Earth is the third planet from the Sun? It is the fifth-largest planet in the solar system. Find out more in Earth, one of the titles in the Discovering Space series.

Sydney is Australia's largest city. It is known for its scenic harbor. Sydney's Harbour Bridge stretches across the harbor, linking the northern and southern parts of the city. Find out more about this fascinating city in Sydney, a title in the World Class Cities series.

The president of the United States is the head of state. This means that he or she is the top leader in the country's government.

Did you know that baby raccoons climb trees? Their mother teaches them how. Find out more in “Raccoons”, a Little Backyard Animals book.

Pushing the roundabout makes it spin. Pulling the roundabout makes it stop. Learn more about what is pushed and pulled at the playground in At the Playground. This title is part of the Pushes and Pulls series, which has been developed for children ages 5 to 7.

Did you know that an opossum mother carries her babies in a pouch? The pouch is part of the mother's belly. Find out more in “Opossums”, a Little Backyard Animals book.

Did you know that caterpillars turn into butterflies? They make this change inside a hard shell. Find out more in “Butterflies”, a Little Backyard Animals book.

Octopuses are known for having eight arms. If an octopus loses an arm, it can grow a new one. Find out more in Octopuses, one of the titles in the Creatures of the Sea series.

Glacier National Park sits across the border from Canada's Waterton Lakes National Park. Together, Glacier and Waterton Lakes form the Waterton-Glacier International Peace Park. Find out more in Glacier, one of the titles in the National Parks series.

Olympic National Park is home to the largest temperate rainforest in the Western Hemisphere. At least one of the trees in Olympic is almost 1,000 years old. Find out more in Olympic, one of the titles in the National Parks series.