My son just turned four yesterday. I just started teaching him to write his letters and make each letters sounds. He is picking up very quickly and is absorbing the information like a sponge. He is big for his age 3 foot 6. When I take him to the park I hear children speaking who seem to be his age and they speak so fluently. My son is speaking in full sentences but I still have to decode what he is saying. My son passed a boy riding on a young toddlers bike and my son said "hey I have that bike" the little boy said "you stay on that side and I will stay on this side" My son said "I've got scary stories, yeah we just got that book" the little boy said " what kind of scary story?" My son said " the scary story, that's what's happening" the little boy responded " what is happening?"
My son doesn't ask questions like this and doesn't speak so fluently. Should I be worried? Around what age do children speak fluently? Will his language skills advance in the next six months? Obviously this depends on many variables but do children typically advance a lot during year 4-5?