This is completely my 2 boys. Neither on the spectrum. Both have always been fascinated by words, making up their own at a very young age and laughing about it. My younger, DS3.5, seems even more into words than the older DS5.5. He constantly asks about what words mean storing them in his "memory bank" for later use. We also tend to use, maybe not the most common of word choice in our family, which exposes them to more advanced language.

DS 3.5 will use sentences like "I ACCIDENTALLY hurt myself", "This dinosaur is very IMPRESSIVE", "I am very CONFUSED right now". Maybe not the most natural choice of words for a 3 year old....:-)

I think it is wonderful though when kids develop an advanced vocabulary at an early age. I really enjoy reading everyone's posts!