Two-way whistle helps promote the ability to blow and chew, and furthermore stimulate the early language development. Therefore, it was recommended by American Specialty Toy Retailing Association for top sensory development. The Flower Whistle is perfect for sore gums to reduce fussiness and discomfort. It is recommended for age 3-month up and perfect for baby shower or newborn gift. The macaroon, bright and cheerful colors are adorable and ideal for engaged play with parents and siblings. The Japanese artisan spirit behind the one-piece construction makes it very easy to clean. This product meets or exceeds ASTM and CPSIA safety regulations.