Intellectual stimulation may prevent cognitive decline. Studies have shown computer use, playing games, reading books and other intellectual activities may help preserve function and prevent cognitive decline.
Social engagement may make life more satisfying, and help preserve mental function and slow mental decline.
I thought my mom would find scrabble more congenial than my dad's suggestion of hearts. My dad's response was horror: his spelling is much worse than mine. He recognized that it would be good for my mom though, so he gamely agreed. Mom, however, disappeared and called her sister.
I was very disappointed. One reason is just the hope for ever having a relaxed time with my mother that isn't folks trapped in a car....
but it's time to go to work.