Your baby lives in a world of sound. He could hear the sound of cars driving by as the wind rustles in the trees, streams, fly airplanes. Sit in front of an open window and listen to street noise. Tell each other what you hear.
Publish yourself some sounds, such as buzzing train, and ask your baby what it is. Exchange roles. Teach your child to raspoznavat different sounds, and it is also possible to publish them.