By: Heather Manley
Age Range: 4 to 10 years
Merrin and Pearl's little cousin Max is sick, threatening everyone's Mexican holiday. This time the girls find themselves in Max's body, witnessing firsthand the immune system in action. They befriend a white blood cell warrior who leads them into battle against the offending bacteria, and listeners learn why it's important not to eat candy and sugar when you have an illness - it can fuel bacteria and viruses and make you feel sicker.