Since my 6 (soon to be 7) year old was a baby, he's been 'hand-flapping' mainly when he's excited or really enjoying a game etc. His nursery teacher mentioned it and broached the subject of Autism when he was there, but both his Reception and Year One teachers have always maintained that it's nothing to be alarmed about.
He shows literally no other symptoms of Autism of any kind, is a sociable, happy, bright and very well-behaved boy, a golden child 
I've read about 'Stimming' but could this still be an Autism thing?
Has anybody any experience of this? x