Benjamin's sign vocabularly is growing at an amazing rate, and he now randomly (or so it seems) will repeat the occasional spoken word we use. And I think he understands *everything*, including words I don't think we've ever used to him, just around him. Today I commented, when Benjamin's hands were full of crackers, that he really needed a pocket to put them in. Benjamin immediately started looking on the sides of his pants for pockets (which he didn't have in what he was wearing at the time.)