Given the correlation between executive mental functioning and children being born into bilingual environments, perhaps such environmental influences should be conspicuously provided by parents and caregivers to both establish enriched linguistic conditions and to promote vigorous mental development in general. Instead of blasting Beethoven in the nursery, play your mix of lullabies in several languages.
It's certainly the best age (the younger the better) to give a child the gift of multilingualism, as Europeans well know. Ideally conversational, so that the child gets the concepts and contexts -- the music and not just the lyric.
Another argument against the pissants who whine about the number of homes where English is not the house lingo.
I'm more than willing to have my children and grandchildren become more linguistic at a early age. Here are my choices...
1. German - Since my family is 100% German-American in descent.
2. Russian
3. Chinese
4. Japanese
5.Hindu(?)
...instead of the puissant progressive liberal belief that we should all learn Spanish as a second language.
You'll also note that the languages that I prefer to be taught are the languages that the professors at colleges recommend for high-tech courses. So let's open the flood gates to people from these countries so they teach our children those languages instead of catering to a minority group that came here without permission demanding we learn their language.
*****CHUCKLE******