I have this theory about brain use. I think it is important to keep using that most important part of our neurological system. Things like playing bridge, doing math problems and crossword puzzles, and thinking about complicated patterns are good ways to keep the brain in top shape and maybe warding off the ravages of age-related ailments such as Alzheimer's and Dementia. This block is a perfect example. I think a block like this per day will keep Alzheimer's at bay! I'm just saying. Sorry, I have no research to back this up.