what did stacy promise little man

Stacey makes Little Man, Christopher-John, and Cassie promise to meet him in the school toolshed at lunch. They plan to set up a trap for the school bus that splashed them. They take buckets and shovels and return to the spot where they were forced off the road. There, they dig a ditch across the area that fills with gully water and makes it look as if the road washed out from the rain.