A social contract is like an agreement between people in a group. Imagine you and your friends are playing a game together. Before you start, you all agree to some rules like no cheating, taking turns, and being respectful to each other. That's like a social contract.
In a bigger group, like a country, we have more complicated social contracts. The government and the people agree to follow rules and laws that make the community safe and fair for everyone. For example, we agree to stop at red lights when driving so we don't crash into each other. We also agree to pay taxes so the government can build roads and schools to help everyone.
The social contract means that we all have to do our part to make our community a good place to live. We have to follow the rules and help each other out. If we don't follow the social contract, there might be consequences. All in all, the social contract is like a big promise we make to each other to be good neighbors and citizens.