Help Students Hear Individual Sounds In Spoken Words With This Unique DeviceThese phone-like devices magnify the voice, making it easier for students to hear the sounds that make up words (phonemes) as they learn to read, spell, or process language. In speech therapy, the Toobaloo's auditory feedback helps improve articulation and phonology. To clean, just stick them in the top shelf of your dishwasher.12 plastic Toobaloos * Size: 6½"L each * Colors: Available in blue/green * blue * or red