When parents think about bringing up their children bilingually It is a good idea to clarify the meaning of bilingulism, because there are many incorrect definitions based on myths, for example, a person has not have to speak with the same fluency in both languages to be bilingual, there is ussually a "dominant" language.
A simple definition of bilingualism can be using two languages on a regular basis.
In this video you can watch different experiencies from bilingual persons and why is important for them to speak two languages.
