Everyday mysteries

Simple text and illustrations explore how light bulbs emit electricity as well as the three parts of the bulb.

Simple text and illustrations explore what makes fire burn, including friction, gravity, and combustion.

Simple text and photographs explain what electricity is, where it comes from, and how it is used.

Brief text and photographs show how recyclable garbage is transformed into new products.

Brief text and photographs follows the mail as it goes through the post office and processing plant where it's prepared for the rest of its journey.

Brief text and photographs tell where our clean water comes from and how wastewater is treated to make it usable again.

Simple text and photographs describe what garbage is and what happens with it after it has been thrown away.