I originally thought I would be in charge of a large group of boys. Seven-year-old S told me his class was divided up into animal groups for the field trip and he was an "Arabian sand cat." He said I would be in charge of all the Arabian sand cats. I pictured me, literally, herding cats.
But it turned out that I was only in charge of two boys. So I said, "You guys lead the way and I'll follow." It worked out great. Except for a few unexpected lessons from the lions.
7 yr old boys: "What are they doing?"
Me: "Um, uh, playing piggy-back. Let's move along... Oh, look, poison dart frogs!!"
I was NOT going to teach them anything about that topic!! Let their parents do that job.