A beautiful design for a whistle. The provision of the slide encourages children to sustain the length of their blow to encourage greater diaphragm action and self regulation. Coordinating the hand and mouth actions also encourage children to visually track in and out of convergence as they watch the slide move in and out.
A great addition to your oral motor collection.
Manufacturer recommends for ages 2 years plus. Phthalate and BPA free.