This document discusses various aspects of bilingualism, including:
- Bilingualism is the ability to communicate in two languages, with greater proficiency in one. Children can acquire two languages simultaneously through the same stages of development as monolingual children. 
- By age 3, bilingual children develop basic interpersonal skills in both languages and then cognitive academic proficiency. Accessing two languages early in life can accelerate verbal and non-verbal development. 
- Bilingualism benefits cognitive development, helping children solve mental puzzles, boosting brain function, and protecting against dementia later in life. It also influences social identity by challenging world views.