Sorry, no pictures on this post, but I was so excited tonight when I figured out that he was signing the word "bath" to me and wanted to take a bath. He has never signed bath before, but used it appropriately to ask for what he wanted. (He giggled with a BIG smile when I asked if he was asking for a bath.) First he signed "shower" but was pointing to the bathroom where we don't shower, then rubbing his hands on his chest. The sign for "bath" is basically rubbing your fists up and down on your chest, with your thumbs sticking up.
I love this communication with him!