Different languages cut the world into different slices.
Language develops by interacting with other people talking to you.
We have this enormous connection to the living world that is reflected in our language...
Kids will use their own system at the stage that they are, they're not (learning merely by) imitating you.
Your brain is not formed when you're born. You have to build your brain.
Of the top 30 words that parents are calling kids' attention to ('look at the'), 12 are animals.