Want to have a little workout for your brain? Flash Fabrica is pretty fun/addictive.
This test will tell you if your brain is as old as your body.
1. Touch 'start'
2. Wait for 3, 2, 1, seconds.
3. Memorize the numbers' positions on the screen, then click the circle from the SMALLEST NUMBER TO THE BIGGEST NUMBER.
4. At the end of game, the computer will tell you how old your brain is.
At first I wondered -- is it better (score-wise) to have a younger or older brain? Apparently, younger is better.