Try to whistle, it will a sound like bird songs, training baby's hearing ability. 35pcs Mini Bird Whistle Music Rhythm Whistle Children's Educational Toys. 3Pcs Boy Girl Musical Toy Slide Whistle Push-pull Flute for Creative Play.
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ELEOUTI Plastic Pigeon Training Whistle Lightweight and Easy to Install Bird Caller Whistle for Tracking and Bird Flights Suitable for Pigeon Trainers and Hobbyists
