Bilingual babies' vocabulary linked to early brain differentiation

Bilingual babies' vocabulary linked to early brain differentiation
ScienceDaily (Aug. 29, 2011)
quotes from this article:

"...the researchers report that the brains of babies raised in bilingual households show a longer period of being flexible to different languages, especially if they hear a lot of language at home".
"The bilingual brain is fascinating because it reflects humans' abilities for flexible thinking -- bilingual babies learn that objects and events in the world have two names, and flexibly switch between these labels, giving the brain lots of good exercise..."
"The researchers say the best way for children to learn a second language is through social interactions and daily exposure to the language....Learning a second language is like learning a sport [...] [t]he more you play the better you get".

Babies Raised In Bilingual Homes Learn New Words Differently Than Infants Learning One Language

Babies Raised In Bilingual Homes Learn New Words Differently Than Infants Learning One Language
ScienceDaily (Sep. 28, 2007)
a quote from this article:

"research has shown that bilinguals and monolinguals achieve language-learning milestones (such as speaking their first word) at similar ages and have vocabularies of similar sizes when words from both languages are taken into account".

My son is 20 months old

New words appeared:

- "катись" (to roll down) and he says "катись train" while pushing the train down the slide;
- "будешь", but I don't think that he understands that it means "you will".