In the childlab of the Max Planck Institute for Human Cognitive and Brain Sciences in Leipzig, Germany, the linguists examine among other things, how babies and children process language. They want to know which steps are necessary to understand words and sentences.
They measure the brain activity of children by means of electroencephalography (EEG) and magnetic resonance imaging (MRI). By this, the scientists can create an image of the brain in a playful atmosphere. In some studies, they also play just with the children. For example, the researchers show three-year-olds two images with different situations and tell a little story that fits into one of the two images. The child then chooses which image matching the story.
Source:Language research: Worth talking about (parent site)
https://www.youtube.com/watch?v=J5P0leTAd-o
English Language Site for Students and Teachers 
This is an interesting topic. Of course, everyone knows that children learn much faster than adults. And we always hear that, the younger the child, the easier than can learn a language.
I have witnessed this personally. It is awesome to see how quickly that people of different ages and different education levels learn a language.
I ended up finding this post and your other post because I just wrote a two part research article about learning statistics as well. But I am not here to promote myself.
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