Imaginative Learning:This sound wave model kit is designed to children's attention and spark their imaginationEncourages Curiosity and Observation:This Sound Wave Demo Model inspire curiosity in young minds by encouraging them to ask questions and make observations about how soundDevelope the Principles of Sound : With this educational toy, children can develope the principles of how sound waves are transmitted through the air, mimicking the process of how our eardrums perceive external soundsMaterials:Made from pp and foam materials, this Sound Wave Demo Prop provide a effective way to introduce scientific concepts to young learnersCompact :The Learning Toy making it easy to handle for small hands,ready for immediate use in educational settings or at homeSize Chart:13x6x9cm/5.12inchx2.36inchx3.54inchPackage Includes:1Educational Sound Wave Model KitNote:1.This is not infant toy , please take away from children to avoid eating.2.Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.