I just came across a fascinating article and I thought the main thrust of it was relevant here, so I'll summarize and share. The "brain-training" industry is an enormous and fast growing financial powerhouse. In October of 2014 a group of doctors warned of exaggerated and false claims of the effects of popular brain games on consumers. Earlier this year, Lumosity, one of the biggest players in the space, was fined 2 million dollars and ordered to give thousands of customers refunds.

The article goes on to show what the spooky looking music/brain graphic below does: Learning an instrument is an outstanding way to stay sharp. Many doctors are quoted in the article, and they are far more eloquent than I am, but here's the take away: if you're an adult and thinking you may be a little more forgetful than you used to be, or your losing a little of the ol' brain power you used to have, don't waste valuable time and money playing games on your phone. 

Grab a guitar and start making beautiful music.