FireFly on Paradise----just down from the Convention Center is a fun place to grab dinner. It's a Tappas place, so you get to sample all kind of cool stuff.
There are also helicopter tours of the Grand Canyon available--- I'd think that would be fun. Old Fremont Street Vegas is fun and kitchy--- they have a zip line that looks to be pretty amazing as long as you aren't scared of heights!
+1 on the Red Rocks drive, and Hoover Dam tour