"What happens underneath our skin? Shine a light behind the page and see ... Explore the human body up close and discover how incredible it is! From the air we breathe and the food we eat, to the muscles that help us move and the heart that pumps our blood, the hidden wonders of the human body are revealed. The clever see-through reading technique creates an experience of interactive learning, showing both the surface and what is hidden underneath at the same time."-- Back cover.

"Hold the page to light to reveal hidden secrets"--Cover.