I was teaching third grade in 1957 in a low income area where the children had few advantages. So I took the class on a field trip in a big school bus about thirty miles across the Bay Bridge to San Francisco zoo. Many of them had never even crossed the bridge before.
At the zoo we saw all the usual animals, had our bag lunches and played on the equipment at the front entrance then left for home. In the classroom discussion the next day when asked what they remembered most was the "fun bus ride" and "seeing hippopotamus going to the bathroom." Depends on your point of view I guess.