Many parents allover the worlds are using sign language to communicate with the world one way or the other. So it will be better to learn the correct ways of the sign language initially and transferred to the child. Doing this way will help him in the future also. Babies will always have the desire to communicate with the parents. But since they lack the ability to speak them usually scream or cry to express them. Sign language will provide a means for communication and express their wants and needs more easily. The parent should have the basic knowledge in sign language before teaching it to the baby.
Learning sign language will enable you to communicate with people who don't have the ability to speak or listen. It will help you to get involved with the culture and life of the deaf people. Not only it will increase your chance for better employment prospects it will give you more social status. Learning the sign language will become handy in many situations. You can use it even with people who don't know your language and there is no source for translation. Now many schools have made the sign language mandatory in their curriculum. Government services like police department are also trying to include people with knowledge to interact with diverse society.
Learn Sign language
Basic Facts of American Sign Language
British Sign Language