"A boy goes on a long car ride to visit his grandmother and discovers time moves faster or slower depending on how bored he is"--

Mitchell never wants to go to bed until, at the age of three years, nine months, and five days he gets his license so that he can drive there--at least until he and the car have a disagreement about what fuel goes in the tank.

Fourth-grader Cal learns a lot about teasing and standing up for others when a weird new student joins his class, while Stella, the tenth-grader who lives with Cal's family to help his mother, practices for her driving test.