Okay kiddo, so a "catastrophe bond" is kind of like a bet.
Let's say there's a company that insures houses in an area where there might be a big hurricane. They're worried that if the hurricane hits, they might have to pay out a lot of money to fix all the houses.
So they ask some investors to help them out by buying these "catastrophe bonds". The investors give the company some money, and in exchange, they get a promise that they'll get their money back PLUS interest if the hurricane DOESN'T hit.
BUT if the hurricane DOES happen and the insurance company has to pay out a lot of money, then the investors might not get all their money back. They took a risk because they wanted to make some extra money, but it might not work out for them.
So basically, a catastrophe bond is like a way for both the insurance company and the investors to protect themselves from a big disaster. It's a way to spread the risk around and make things a little bit safer for everyone.