I see it is one of first sign of spectrum, and it is important.
I also see my baby which is now 13 months doing it from month of 3, mostly when we drive him in baby chair, he is flapping with arms and legs all the time.
He is also squeezing his hands sometimes in a repetitive way.
How are other experiences and is flapping and to what extent normal for 1 year old baby?
I am confused because articles says it is normal, but when i type "baby flapping" on videos it gives me hundreds of videos related to changed spectrum, and none of them says it is normal.