Well, not only was the brief previous answer silly, it was misspelled. So -
How young children communicate depends on several rather obvious factors, mainly their age and the nature of their relationship. A video which has been grabbing a lot of attention the past few days illustrates this beautifully. It shows two quite young twin boys who haven't yet acquired what we would consider language. But, to me, they are clearly communicating. They look at each other, they signal to each other, and they make noises which appear to be meaningful to them. They are together so much that they have developed between them a method of sharing ideas. They could be saying something like, "Hey, look at this funny thing." Now a child who does this may try to do similar things with someone else, even a parent, without much success, for a number of obvious reasons. It's been shown that children who do this may even develop their own language or speech which they continue even when they have acquired standard language. It's their own after all.
Most children communicate with each other by talking.
Insects communicate with each other by sensory.
I do not know how Jaguars communicate with each other. They might growl or purr.
They communicate with each other through Canalicili Extensions.
Autistic parents are advantageous to autistic children because they understand each other and can communicate with each other and share interests effectively.
Penguins communicate by touhing each other, or feeling each other
they hit each other
They communicate with each other by sharing their ideas and maybe talk about their experiments together or writing to each other
Salamanders communicate with each other by visual ways. They also secrete a chemical that other salamanders can smell as a way to communicate.
by talking to each other
Caribou communicate by snorting or grunting :>)
Non-sentient objects do not communicate.