There is no way to predict the behavior of kids in a lesson. I've had kids in front of me take the wrong trail even when given specific instrutions to stop at a designated spot. "See that sign? The big red one? Stop right there. Do you understand?" Child says yes and still goes right past it.
At the tender young age of 32, I learned the importance of communicating with kids. We were stationed in Okinawa and my wife was barbecuing in the back yard. She had to go in the house for something and told my oldest daughter, then 8 - now 25,
Wife - "Jeannette. Watch the grill incase it catches on fire."
Jeannette stood several feet away from the grill on the patio and dutifully watched it.
My wife returned in just a few minutes to find Jeannette a little further away because of the heat and the grill had flames a few feet in the air!
My wife quickly covered the grill and said to Jeannette (a bit sternly) - "I thought you were watching the grill for me?"
Jeannette - "I was watching it."
There is just no telling how kids put things together.