Communication begins as soon as a baby is born. This is especially true if you are raising a baby to be bilingual. To help a baby's development, it is important for parents to have quality and consistent communciation with them in various forms (eye contact, facial expressions and overall one-on-one feedback).

From the article:

"One, a former Spanish teacher, speaks to her three little boys only in Spanish; her husband and almost everyone else in their lives speak to them in English. The oldest, now 3, is fluently bilingual and readily translates into English what has been said to him in Spanish. If I ask him something in Spanish, he responds to me in English (he quickly recognized my limits with Spanish) and even corrects my mispronunciations of Spanish words.

So much for the notion that learning two languages simultaneously delays a child’s language development."