El Castellano published an intriguing article a few weeks back about the effects of bilingualism on the brain. The article, titled "Los idiomas entrenan el cerebro" (Languages train the brain), describes the results of a number of studies on bilingualism. My favorite finding? It never is too late to learn a language. In fact,  learning a second language late in life has beneficial effects beyond being able to communicate with a whole new crowd.

The studies shed some light on why young children learn multiple languages so effortlessly and completely, as well.

And the article is in Spanish, so reading it alone will be a good workout. :)