Even though Henry is looking forward to going to kindergarten, he is not sure about staying once he first gets there.

To celebrate the one hundredth day of kindergarten, each student brings in an example of 100 for show-and-tell, including a 100-year-old relative, and Ms. Bradley shares the jar of 100 jelly beans that have marked the days.

When Henry's imagination gets mixed up with the truth during show and tell, his teacher suggests that he write and illustrate his own stories.