When my son was young, he brought his brand new jackknife to school for show-and-tell. Back then he was in a public school.
When he excitedly showed it to his teacher, she expressed her admiration, but then held it for him and postponed his turn at show-and-tell until the following day. She quietly called me on her lunch break and asked me to pick it up, and help my son pick out another item to show the next day. She was technically supposed to report the incident, but explained to us that she felt that would be over-reacting.
We did appreciate how she managed things. We parents were able to explain things to our 2d grader in our own way, and he happily showed off his fishing pole the next day.
I brought an entire wolf skin to show and tell in fourth grade. It was a huge success. Probably had a scout knife in my pocket.
Today’s education is about as Marxist/Leninist as you can get.