The HBD stories feature two young “Human Body Detectives,” Merrin and Pearl, who magically enter different systems in the body to solve health mysteries. Through action packed educational adventures, readers learn how the various systems work and which foods best fuel each system.
Battle with the Bugs
Learn about the immune system
Merrin and Pearl’s cousin Max is sick, threatening everyone’s Mexican holiday. This time the girls find themselves in Max’s body, witnessing first hand the immune system in action. They befriend a white blood cell warrior who leads them into battle against the offending bacteria.
Watch the YouTube video here: http://www.youtube.com/watch?v=tVadzIsYexg