@ThirdChildFourthPile - I do hope you would never tell an exceptionally tall child, to their face, that you think it's abnormal. The definition of abnormal, is something that deviates from the norm, in a way that is concerning OR undesirable.
I was a tall child, ended up at 6ft 3, which was the height I reached at 18. At the age of 10, I was the same height as the average 14-year old boy, and they weren't exactly enjoyable words to hear as an 10-year old girl.
At 11, other girls in my school called me abnormal, and it was heartbreaking. I knew they weren't using it in the way of being concerned/worried, but were telling me it was 'undesirable'. Basically they were calling me a freak. In fact they did proceed to label me a freak, a few weeks later, and that's what stuck.
This begun a love-hate relationship with my height, and a long period of depression, which included suicidal thoughts.
It took me a long time to come to terms with my height, and to embrace it, all thanks to those words. Words matter, so be carefully what you say.