"PLAYING SHOULD BE FUN! In our great eagerness to teach our children we studiously look for "educational" toys, games with built-in lessons, books with a "message." Often these "tools" are less interesting and stimulating than the child's natural curiosity and playfulness. Play is by its very nature educational. And it should be pleasurable. When the fun goes out of play, most often so does the learning."
One reason to promote educatonal games is to encourage students to learn outside of class. Young adults will go out of their way to play games, even a single game, for hours on end.