I know it will get old fast, but...

One of the bain of any parent-of-a-toddler's life is the word 'No!' or the expression 'No! Mine!'
for the last,mmmm, just about year now, I have been praying for those words. Personal pronouns are very important, and many kids on the autism spectrum do not have them. Thor did not have them, recently they would flit in and out of his vocabulary, but never anything concrete, and we never knew that he realized that mine and me meant that this belongs to me, and me is the person who is talking.
In the last few days, no has become a part of the vocabulary, even the crowning phrase, no mine! followed by grabbing the contested item, and holding it to one's chest.
I verified today that Thor understands that no is not affermative, that it is the oppisite of yes, a word he understands, and says, well. We tested this when I was getting Buddha a sippy cup. I asked Thor is he wanted one, and he gayly stomped around the kitchen singing "No nonono No" So I told him I was putting the milk away. He said NO! I asked if he did want a sippy to drink, and he said yes, brought me the sippy, and the lid. I asked if I should give the Sippy to Hermes, he said no, and I asked if Thor wanted it, he held out his hands and said yes.

This exchange is huge. We were on one topic for over a minute. He only used to words, but he had the appropriate actions to go with them. He responded when asked something, and when he didn't have the words he needed, he showed me, and brought me, what he wanted.
We are working on 'Please' and 'Thank you' as well. Thank you is pretty good. It comes out more like sank uu, but it is good. We are realizing, though, that by having him say please. apple. plant, and pineapple and pan and pot that Thor has an issue with the "PL" sound. He can do the 'puh' p noise fine, but the 'pl' feels wrong in his mouth. As much as I don't want him to say the words wrong, I am debating teaching him words the wrong way, and working on the pl combination after he has more practice. He is pleased to say pease for please and be understood. He is frustrated to go pl pl pl, and not be understood.

As happy as I am for new words, I am certain that in about two weeks, I will be sick of No! and Mine!, but for now, they are pure heavenly music.