Ages 7–9

What a World: Four-Book Series Children's questions never seem to end. This information series encourages them to look more closely at their surroundings through clear, accessible explanations. Insects: tiny, numerous...

Demand for electricity to power machines continues to grow, while some ways of using energy pollute the planet. Explore renewable and non-renewable energy sources, how energy use contributes to global...

Adam's teacher gives everyone in his class a seed. As they wait for the seeds to grow, the children discover different kinds of plants and what they need to thrive....

Climate change and human activity threaten Earth's biodiversity, putting many plants and animals at risk of extinction. Discover how biodiversity affects food chains and natural habitats, why people need to...

A growing population puts pressure on our planet. Population growth and excessive consumption can damage the environment and deplete natural resources. Discover why the world's population is increasing, which countries...