So there's this really important story about a man named Jesus who lived a long time ago. He was really popular and had a lot of friends who loved him a lot. But some people didn't like him and were mean to him.
One day, those mean people decided they wanted to get rid of Jesus for good, so they arrested him and did really bad stuff to him. They even put him on a big wooden cross and made him suffer a lot. It was really sad.
After he died, Jesus' friends took his body and put it in a tomb, which is like a really big fancy grave. They wanted to say goodbye to him properly and give him a good resting place.
But here's where things get really interesting. Three days later, when Jesus' friends went to visit the tomb, they found that the big heavy stone that was blocking the entrance had been moved away. When they went inside, they saw that Jesus' body was gone!
At first, they were really scared and confused. They didn't know what had happened. But then they saw an angel who told them that Jesus wasn't there anymore because he had risen from the dead. It was a miracle!
So the empty tomb is a really important symbol for Christians because it reminds them that Jesus conquered death and rose again, which means he is still with them and watching over them today. It's a really powerful story that gives them hope and comfort, even when things are tough.