Now that he's older he learns signs much faster. It seems like he's picking up new signs (and words) constantly. He now uses twenty signs regularly! I love love love being able to have simple conversations with him. It's wonderful to have him tell me he's hungry, instead of realizing he's hungry only after a temper tantrum or other sign of crankiness. Less wonderful to have him request to visit the vacuum cleaner and washing machine every twenty minutes...
A lot Nate's signs are starting to look alike. Nate's just started signing BOOK, which looks a lot like his version of ALLIGATOR (and that looks an awful lot like one or two claps). You can view the correct ASL sign for BOOK here. I use the sign for BOOK to mean both "book" and "read." Here's Nate's version of BOOK (and BIRD):