There’s no better way to test your attention span and IQ than with brain teasers but The Great Brain Experiment is much more than just that.
The Einstein Brain Trainer helps keep you sharp with a variety of brain teasers and puzzles that are designed to improve memory and cognitive ability.
Lumosity.com is a bit of a workout — for your brain. Log on and have your brain tested. You’ll be asked to click on the screen and then guess at certain games.