We have been trying to teach Blaise some signs. Really, we started a long time ago, but it didn't really catch on, so now that he is older and learning at a much faster rate than I am, it seems to be much easier. He made up his own "I'm done" sign (see last post), but the first one he did that we taught his was eat/drink. Unfortunately we haven't been able to see a clear difference for eat or drink, but at least we have the general idea. He seems to do this sign quite often recently and when he really means business, he starts doing it harder! For example, if we are taking too long in the morning to get moving on his breakfast he'll start pounding his mouth with the "eat" sign...sheesh.
He also does the sign for "milk," "crayon" and "car". We are working on other important ones like "hug" and "I love you"!