Gr 2-5-This series cleverly draws kids in by using everyday objects such as a guitar to explain sound, hearing, decibels, pitch, and musical notation or a bicycle to outline physics concepts such as gravity, friction, and torque. Some history is included as well-for example, Glasses discusses Leonardo da Vinci's 1508 sketch of a design for contact lenses and Benjamin Franklin's invention of bifocals. Employing illustrations, colorful photographs, highlighted fact boxes, and bold-faced text, the books are eye-catching and compelling. Bread is particularly enjoyable as it describes the role of yeast and the chemical reactions that occur during baking, and introduces the digestive process. Great additions.[Page 93]. Copyright 2008 Reed Business Information.