A child on a field trip to a greenhouse.
field trip definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a trip away from the classroom to permit the gathering of data at first hand
field trip definition by American Heritage Dictionary
A group excursion for the purpose of firsthand observation, as to a museum, the woods, or a historic place.