A new study from La Trobe University highlights yet again the importance of bilingualism from a young age. The same way that early exposure to multiple languages increases cognitive abilities in hearing children, exposure to both spoken and sign language for deaf children has positive effects on cognition and language learning. Check out this article for more details.
While you’re at it, feel free to increase your own bilingual abilities by taking a moment to learn some basic greetings in British Sign Language (BSL), which was the sign language focused on in the study.
Bilingualism Research Today 
“The same way that early exposure to multiple languages increases cognitive abilities in hearing children, exposure to both spoken and sign language for deaf children has positive effects on cognition and language learning”
It is a wonderful thing that even a deaf child can learn anther language, and it will have the same positive cognitive effects on them as a non deaf child. If a child that cannot hear can learn another language, surely we as adults can learn another language. This is a rather inspirational blog! (http://blog.dinolingo.com)