Today's grievance: unnecessary use of "ages." When an event is for "children ages 10 and up," delete "ages." Believe me, readers will still understand.
That doen't mean "ages" should always be deleted, though. Consider: "The event is $5, $4 ages 8-12." It works there because you don't have a noun that already indicates an age.
It's just another reminder to make sure each word is necessary — especially in those charts and listings for calendars we copy editors have to trudge through. It can save valuable space.