I think it was ages ago & might be in archives somewhere now A few of us have used sign with our babies. I only used a few signs with Matilda and I started at 6 months when Matilda was starting solids. We had signs for more, finished, milk, drink, eat(hungry) and one for love. It did take away heaps of frustration with her eating and thats why those signs stuck so well. She still uses them if she's trying to really convince us that she is finished with dinner even though she can communicate well & we are choosing to ignore her....