The Suez Crisis was like when two kids wanted to play with the same toy at the same time, but they couldn't decide who it belonged to. In this case, the kids were two countries called Egypt and Israel, and the toy was a waterway called the Suez Canal.
The Suez Canal was an important way for ships to move goods between Europe and Asia without having to go all the way around Africa. It was owned by a company that was mostly run by Europeans, but Egypt decided they wanted to take control of the canal and the money it made. Israel, on the other hand, wanted to make sure Egypt couldn't use the canal as a way to attack them.
Britain and France were worried about their interests in the region, so they joined with Israel in a plan to take over the canal by force. They sent their armies to Egypt and took control of the canal, which made Egypt really angry. The United States and the Soviet Union got involved, and they told Britain, France, and Israel to leave Egypt alone.
In the end, the crisis was resolved when everyone agreed to let the United Nations help run the canal and make sure it was open to everyone. This helped ease tensions and prevent further conflict between the countries.