Social insurance is a system that helps people who are in need. It makes sure that everyone has the basic necessities they need to have a good life, like food and a safe place to live. The idea is that everyone pays into a fund, which is like a savings account, and then if someone needs help, the money in the fund can be used to pay for it. This way, everyone helps each other out and no one person has to be responsible for taking care of everything. It’s like when you and your friends share an umbrella when it’s raining—everyone contributes so that everyone can stay dry!