The researchers conducted an experiment to see how families decide to share resources (like money or time) within the family. In families where everyone cares about each other and shares, they tended to provide the right amount of resources. The experiment proved that both parents and children are more willing to share resources with family members than with strangers, showing they care about their family. However, the behavior of the children didn't always lead to the most money for the family, even when their parents were generous. This contradicts the idea that children always want to maximize the family's overall income. The results suggest that family bonds and caring for each other play a significant role in how resources are shared within families.