PECS is helpful. However you have to learn what are the sounds that he can hear. If you clap, does he come back? If you knock on the table, does he know that he has to sit down? Try to use gestures to come back or sit down. He probably hears you, but if he is non verbal he does not hear everything, because he is undeveloped.

Mine have gone through that as well. I bought punching bags for kids and put it in the corner. I also gave a sticker or m&m every time they put the item down nicely. Do roleplay with someone else. Let your child see your frustration with the other person and you place it down. A lot of what my children have learn was by doing this and positive reinforcement.

My son is also 2.5. We had to pay attention for triggers. Then we would tell him what was going yo happen before it did. It help reduce the anxiety. We also did teach him signs and that helped soooo much. Now I tell him to use his words and he signs what it is he wants. He was in the habbit of bitting. He bit so hard he drew blood. Since he learned the signs ...he has stopped. I didnt think he would use the signs, but we kept trying. About 3 months into theropy he started using them and he now has abiut 12 that he uses daily

@A MyAutismTeam Member is correct this may be coming from the lack of communication skills, and with a child as young as yours it is tough. The most common communications skills would be sign language and PECS which can be done with paper symbols or with the use of an electronic device. A little ABA would help as well because the child has to know that the behavior is not appropriate and they need to do things properly. Your child's age makes this difficult but not impossible, a therapist may help with that. Being under 3 your child should qualify for early intervention, I would contact them.

Thanks everyone! He has stopped the hitting and throwing unless hes frustrated and bored or restless. Now we try to watch for those triggers and prevent them from happening. Im also trying to find sensory gyms so he can get the physical activity he needs.