Using sign language in Down Syndrome can make life a lot easier for everyone concerned. Many children with Down Syndrome have some degree of speech delay. This makes it difficult for the child, as well as the parents, to communicate. A child (of any age) needs to be able to communicate to her parents and caregivers what she wants/needs.
When babies reach a certain age, they start to form "opinions" about what they should eat, when they should eat, where they should eat and more. When your baby can't communicate this need/want to you (the caregiver) she will become frustrated. If you can't guess what it is she needs (i.e. a drink, a cracker, a diaper change) you will both become agitated very quickly. She will fuss and cry, and you will…hmmm…well, maybe you'll cry too!
Sign Language
Sign language is an excellent means for you and your baby to communicate. Many babies can pick up signs long before they speak their first words. Even more so with babies who have Down Syndrome. Since their speech is often delayed, it is highly beneficial to learn some alternate method of communication. There are many programs on the market for learning sign language. Your early intervention program may also be able to help you and your baby learn signs.
Other Means of Communication
Of course, there are other means of communication such as smiles, gestures, and other vocalizations (like crying and screaming). Picture boards can also be used when your baby is a bit older. The most effective means, in my opinion, is still signing.
How to teach your baby signs
Start simple
Begin with simple signs like "eat", "drink", "sleep", "milk", "more", etc. My son's favorite is "eat" of course! It was also his first.
Use the sign often
Introduce one sign at a time, and use it every time you do anything related to it. For example, if you want to introduce the sign for "eat" you would make the sign and help your child make the sign every time she eats. It is also important to actually say the spoken word as you sign it. This way she will hear it and learn to associate it with the sign.
*Tip* When helping your baby learn a sign, come from behind her and help her hands form the shape and make the movements. The feel is just more natural that way. You will be guiding your baby's hands as if she was making the sign herself.
Above all, make it fun! Be enthusiastic (over enthusiastic even) when your baby even attempts to make a sign. Never mind if it's not perfect. As long as you know what she is "saying". With age and experience the signs will become better. I can't stress enough, in everything your baby does, praise her, make a big deal, show your excitement. It will motivate her to try that much harder.
For more information on teaching your baby to sign: