During lunch we had taken the bag of pennies and scattered them across the ground leaving a group of pennies in the center, and others scattered around the perimeter. We had no hypothesis about what would happen. During the lunch period most people would do one of two things. Either they would walk by and kick the large pile of pennies in the center to scatter them more, or pick up exactly ONE penny, look around, then continue walking. Why? We had a theory that most people are very cautious when it comes to borderline thievery.
As the day went on and people began to go to their classes, more pennies were being picked up (2-3). At the end of the day when no one was around, a person had actually come with a jar and picked up all the pennies. It made me feel good to know that the jar he used to pick up the pennies was actually for donation to a charity (yes, I saw him give it to a teacher and it said "Donations" on it).
People also had more "courage" to pick up more pennies when they were in larger groups. Small groups of 2-3 people would often pick up one each or two would pick up one and the last person would just continue to walk. Large groups of people, 5+, would pick up about a handful of pennies before stopping.
Thought this might be interesting to some people, if you need it for a school project by all means go ahead and use it. It was only for fun between my friends and I.

