Depending on our lifestyle, cognitive activities, etc. there are some brain skills we already use extensively every day. And there are other skills we use more rarely. Our skills belong to the category of “use it, or lose it”. “Brain games: premium and free kindle games for brain training – Brain games Vol I” selects, reviews, and offer free access to brain games that you can play online, with or without registration. Then, we review premium brain fitness training games like Speed Match, Lost in Migration, Word Bubbles, Memory Matrix, etc. to maximize your Speed, Memory, Attention, Flexibility and Problem Solving skills. We see how to get free trial access to these additional brain games.