My girls call it "The Candy Bar Lesson" and they love it. I got it here: http://www.lightplanet.com/mormons/ywc/activities/whatkind.htm and a Special Thanks to whomever is responsible for it.
I bring in a basket full of candy bars which excites the girls immediately to see what is ahead. I allow them to pass the basket and choose their candy. They soon find out that each candy symbolizes certain characteristics of a young man. Some are positive characteristics and some are not. Is his testimony strong? Does he cherish you? How does he treat your family and friends? Does he work hard? Did he serve a mission? Is this the kind of man we want to date and perhaps marry? It leads to a great discussion in YW and sometimes at home.
I always begin with myself as a demo and I always take the Nerds out of the basket. (My husband is a very cute Nerd.) It's a fun Sunday lesson (not on Fast Sunday) or a fun Tuesday night activity. Of course, they get eat their candy when we are finished with our discussion.