Autism-signs Is All Hand Flapping A Sign Of Autism?

Is all hand flapping a sign of autism? - autism-signs

Hands of my 3-year-old son shaking) (fins, in a fit of anger - it is really a sign of autism? Apart from a language delay, no other symptoms, but the school is "true" is in the spectrum. No cooperative play with friends from school, but can not w / her sister. I believe in your school?