Tell them to write a procedure for entering the room and then act out their actions.
I walk to just outside the door and say, "Okay, what do I do first?"
"Enter the room!"
"Okay, what next?"
"Okay!" and I sit down on the floor right inside the door. Guffaws and giggles.
"NO! Go to your seat!"
"OH! Okay." Walk to my desk.
"NOW sit down."
"Alright!" I sit down on the floor, next to the chair. More giggles.
"NO! You have to pull out the chair and sit on it!"
"OH!! Okay. Got it. What now?"
"Go in your bookbag and..."
I look at them, bewildered, and say, "But how will I fit in it? It's so small...."
Guffaws and eyerolls.
"OPEN your book bag!"
"OH, I see!"
and so on.
It was good fun, I say. :)