Human Body Detectives Merrin and Pearl are at it again. Their magical ability to jump into people's bodies and explore their systems (digestive, skeletal, nervous ( June 2014), circulatory, and immune) combines science with their fun adventures to help kids understand their anatomy and how their bodies work. In The Lucky Escape, Merrin and Pearl explore their little brother, Robbie's, digestive system because they have to get a penny that he swallowed Along the way, they slide down his esophagus, bump in to gas bubbles, and learn up close about the functions of the stomach and intestines,...

Human Body Detectives Merrin and Pearl are at it again. Their magical ability to jump into people's bodies and explore their systems (digestive, skeletal, nervous ( June 2014), circulatory, and immune) combines science with their fun adventures to help kids understand their anatomy and how their bodies work. In A Heart Pumping Adventure, Merrin and Pearl enter their dad's circulatory system to explore how healthy his heart is after they see him overindulging in a very unhealthy breakfast. During their journey, they ride on a red blood cell through the lungs, get lodged in a blood vessel by...

Human Body Detectives Merrin and Pearl are at it again. Their magical ability to jump into people's bodies and explore their systems (digestive, skeletal, nervous ( June 2014), circulatory, and immune) combines science with their fun adventures to help kids understand their anatomy and how their bodies work. In Battle with the Bugs, Merrin and Pearl enter their cousin, Max's, immune system to find out why he was sick. During their journey, they travel up Max's nose, ride on a white blood cell into battle against the bacteria that was making Max sick, and use their knowledge of nutrition to...