Lack of communication could be considered a leading cause of frustration for anyone who has something to express and is unable to do so.
Help Me Grow explained to Bradley and I, way back when, that the first signs of communications was Peanut mimicking our mouth movements. They suggested doing oral motor exercises such as opening and closing our mouths, blowing kisses to her, and even sticking our tongue out at her.
Help Me grow explained that the goal of these different exercises was for her to mimic our actions. And she did!

Then enter sign language, an invaluable tool, in my opinion. I have worked with several non-verbal children throughout my time as a behavioral therapist. When I found out that Peanut had Down Syndrome and that many children with DS will have a delay in verbal skills, I knew that I wanted to teach her sign language.
I really felt that just the basics were necessary since the ultimate goal is for her to use spoken language, but I can't deny the fun we are having learning new words together. Way back when, we really only used mama, dada, and eat. She slowly started picking up signs and the first one that she used consistently was
"all done". She very quickly realized that if she didn't want to read, play, or even eat she could sign "all done" and that would be the end of it. As a result, we have very few tantrums because she is able to express when she's had enough of this or that.
Peanut is about 16 months old and has a variety of words in her repetoire now: all done, mama, dada, eat, drink, more, bath, apple, kiss, sleep, and milk. She has also started stringing words together. For example, she will sign "more eat" and "drink milk". Pairing words is a huge accomplishment for any child at 16 mo. old, so we are very proud of her.
I started early with sign language. We have flashcards (either that I've made myself or bought) throughout the house labeling items that are common place. I use sign language when I talk to her, even if she doesn't know that particular sign yet. I've found
Babies First 100 to be a great resource for me to learn new words. For Christmas, Peanut received 3
Signing Time videos that Peanut and I both enjoy watching.
Here's a picture of Peanut signing sleep when is was her nap time.