This story uses characters from the Toy Story movies to describe the immune system. It describes the skin as the walls of Andy's room that provide a first line of defense. Chemical barriers are represented as squirt guns that deter pathogens. Macrophages are portrayed as patrol men that fight off invaders. Helper T cells sound the alarm by getting Rex to roar, and enlist the help of B cells that use laser guns as antibodies. Killer T cells are described as crazy helpers that are called in during really ugly battles. Suppressor T cells end the attack by having Woody ride around on his steed. Memory cells are depicted as Hamm who stores away information to remember how to fight future attacks.