7Kids love activities of all kinds, and projects about sound are the perfect way to engage them in learning crucial curricular concepts such as vibration, reflection (echoes!), volume and pitch, and ultrasound. This engrossing book introduces sound topics, clearly explaining the information learners need to know and the facts that will make them say, "Wow!" Then, step-by-step instructions encourage them to review concepts while completing a related activity, such as creating a sound cannon, making a tuned musical instrument, and much more. A final quiz allows reader to assess their understanding of sound facts.