Arthur's science project is a model of the human heart, and when excited Pal the dog breaks it Arthur is upset and tells his friends that his heart is broken--and as soon as they understand the problem they band together to set things right.
Two aardvarks who lead solitary lives, Aalbert by day and Aalfred by night, sometimes wonder if they would like to be part of a pair but how will they meet?.
D.W., Arthur's little sister, tells all about what it is like to be in preschool, including essential information about such topics as bathroom breaks, storing things in a cubbie, and sharing at play time.