for tours but may give a discount or group rate.
tour a local factory to find out how things are made. see raw materials become shoes, chocolate or clothes. many factories have regular tours, so call the front office and ask how you can arrange a field trip. most factories do not charge for their tours, but double-check this when you arrange the trip.
go to a local greenhouse for your next field trip. call ahead to make sure they offer tours and to find out if they charge. then visit and look at the different flowers and plants. make a contest out of seeing who can guess the correct name for 