Games for the Brain

I really enjoy simple puzzles and brain exercises... I know what you're thinking.  NERD!  Oh well.  So, I checked out Lumosity, but they want you to pay.  Don't get me wrong.  I was very tempted.  I really enjoyed several of their activities on a "free trial - temporary subscription".  In the end I ended up looking for sites that have simple brain exercises and I came across this one.  I've played several of the games.  They're simple, but I've enjoyed several of them.

(Logo from gamesforthebrain.com)