Calvin has always been a boy, even if the world sees him as a girl. He knows who he is in his heart and in his mind, but he hasn't yet told his family. Finally, he can wait no longer: I'm not a girl, he tells his family. I'm a boy?--a boy in my heart and in my brain. Quick to support him, his loving family takes Calvin shopping for the swim trunks he's always wanted and back-to-school clothes and a new haircut that helps him look and feel like the boy he's always known himself to be. As the first day of school approaches, he's nervous and the what-ifs gather up inside him. But as his friends and teachers rally around him and he tells them his name, all his what-ifs begin to melt away. Inspired by the authors' own transgender child, this authentic and personal story promotes kindness and empathy, offering a poignant and inclusive back-to-school message: all should feel safe, respected, and welcomed.