My DS is just about to turn three, has ASD and is non-verbal. Apart from leading us to things he wanted, he had very little non-verbal communication with us - obviously, something which contributed to him being diagnosed.
Previously if we asked him if he wanted something or asked a question he would just look blankly and not respond. Within the last week he has recently started answering yes or no to questions with two different sounds, an agreeing sound for yes and a funny little cough for no. Whilst he's doing this, he looks us right in the eye like he is finally connecting and communicating 
Has anyone else experienced this with their child? We're really positive about this new development and hope that it's a pre-speech thing
. Is there anything we can do to develop this further? Should we be responding to the noises or should we really be encouraging him to actually say yes and no?