Come together, right now…over me
But it does not, to semi quote the Beatles, “...come together right now,” for the child.
In other words, there are many times that the child will strive to find the correct word; to apply the best syntax; to correlate the semantics and pragmatics in order to most effectively communicate his/her thoughts. And, because this is all new, many mistakes will be made.
The "comparator" for the child will be busy sending error messages.
While the child gropes to make the repair, he/she may make additional errors. Children will also frequently supply "filler" sounds to hold their place in the conversation.
Children, like adults, sense that if they are silent, someone else will start talking, or the listener will just become preoccupied with something else.