Nobody Laughed

This story is about nobody Laughed. Aidan walked to school with his new bag
and with his secret thing in them. As he looked around he saw that same people has
the same bag then he saw everyone in the school has the same bag. They went to
class.There class was going for the run and everyone put there bags on the floor.
Everyone had the same bag. When they come back they were not sure which own whose
there. Mr chalmers had a idea to check each bag and see what was in them. If he had
 pick a bag he had to open it and see who owned it. They all get to show what was in
there bag. Aidan was last to show what was in his bag. He didn't want to show
what was in his bag but them he did. What was the secret thing?