When Shawn Trenell, an active 10-year-old, soon-to-be-middle-schooler boy, starts his day by jumping out of bed and crashing to the floor, his mother tells him to “act your age.” After causing further mishaps on the bus ride to school and in the school library, Shawn hears this phrase again, but wonders what the adults in his life mean when they tell him to “act your age.” In guidance class, the school counselor explains that growing up means learning to be careful, thoughtful, and responsible. At home, Shawn decides to be responsible by cleaning his room and doing his homework. His mother realizes that Shawn has been acting his age all along, vows to be more patient with him, and rewards his efforts with a trip to the park and a promise of ice cream. Colorful and appealing illustrations contribute to the positive messages of self-acceptance, self-awareness, and self-actualization. Recommended as a great read-aloud choice for parents and teachers to share with a variety of school-age children.