Light switches and light bulbs illuminate spaces around the world. How Light Switches Brighten a Room introduces electrical currents and explores the parts of light bulbs. Easy-to-read text,…

Arches and triangles are some of the strongest shapes. Why Arches and Triangles Are Strong introduces the forces that hold them steady and explores how they are used to build sturdy…

Skyscrapers allow more people to live and work in big, busy cities. How Skyscrapers Stand Tall introduces the forces these tall buildings experience and explores their strong foundations.…

Rockets blast off carrying astronauts, satellites, and science equipment. How Rockets Reach Space introduces the parts of a rocket and explores the forces rockets must overcome to leave…

Dams control the flow of rivers to prevent flooding and direct water where it is needed. How Dams Hold Back Water introduces different types of dams and explores how they work. Easy-to-read…

Airplanes carry passengers and cargo through the air every day. How Airplanes Fly introduces some important parts of airplanes and explores the forces that keep airplanes in the sky.…

Bridges allow people and vehicles to cross over many obstacles. How Bridges Stand Strong introduces different types of bridges and explores how they stay sturdy. Easy-to-read text, vivid…

Toilets flush away waste to keep cities clean and people healthy. How Toilets Flush and Fill introduces the parts of a toilet and explores how they work. Easy-to-read text, vivid images, and…