Hi, I have a 3.5 year old with mild apraxia. His speech has improved immensely over the past year of speech therapy--he is almost entirely understandable to us (parents) and maybe 60 percent to strangers. But, my question isn't about apraxia, but what seems to be a verbal stim. He has a "happy babble" that's been going on for at LEAST 18 months. It's a sort of cheerful, babbling noise (sometimes with gestures like he's story telling--the gestures are a new addition). I wouldn't call it jargon--just random vowels and consonants (sounds a bit like beat boxing) He usually stares off into space like he's looking at someone who isn't there while doing it and doesn't acknowledge those around him. He is interruptible but sometimes I will have to move into his line of sight or hold his hands to get him to stop. It seems to flare when he is stressed, something is happening developmentally or he's tired (he's been in his room--bedtime--for almost 40 minutes and has been babbling for about that long). It sometimes happens in the middle of the night for upwards of 2 hours (he doesn't want anything or call for us--he's just NOISY) There are no intelligible words in the babble.
Soooo, any thought? What's up with this? Should I worry? (He seems neurotypical, has some sensory sensitivity but nothing that seems to interfere with daily life much)