I asked my DD to do this a couple days ago and she had no mirror movements either, even though she is clearly ADHD. I asked her at about 10 pm at night when she did not have much in the way of medication in her system. However she is a girl and they talked about it being an issue mainly with boys.

I will ask DS and see what happens with his delayed motor skills--he is more like a 4 year old than 6 year old.

Her pediatrician gave me a referral to take her for an OT assessment.