Rex wants to honk the horn of his shiny dino-car—to warn the speeding driver to slow down, to say hello to a friend, and to reprimand a litterbug. All bad reasons. "No honking allowed," says his friend Stego. When Rex finally comes up with a good reason to honk his horn, there's no stopping him! Children will enjoy the rhyming text and high-energy art, and will sympathize with Rex's halfhearted attempts at self-regulation.