Fantastic reply by
*@Maryann1975*.
BIL's DS was not saying a single word at 18months, absolutely reduced to talk. By 2yrs, he was talking full sentences and now at 2.5, literally does not shut up! As PP have said, not talking in isolation is no concern if they understand what you are telling them and can communicate with you in other ways (nephew would take us by the hand and show us what he wanted)
DD knew how to count all numbers to 20 and could read them by 2, however she did not understand the concept at that age so it was meaningless. If you had shown her 4 apples, she would not have understood why that was 4 until a bit older.
Talk loads to your child about absolutely everything, describe it all when you are out, the colours, the sounds, how many there are, happy, sad etc. That will develop their vocabulary. When reading books, take time to enjoy the book, look at the pictures, understand what is happening, make faces based on feelings, guess what might happen next (this bit when little older). Don't worry about finishing the book. Work on gross motor skills and fine motor skills as they get older, playdough, threading, scissors (closer to 2 for scissors), allow them to climb at the park and build strength in arms and legs. Lots of singing and dancing.
Those are the things that will help them at this age. Saying the alphabet and numbers without understanding why doesnt mean much