All people make mistakes and we all do bad things. Everybody, except God and his son, Jesus. Because of our sins, Jesus came to the earth. He healed people and told them about his father. But at the friday before easter, he was captured and killed by crucifixion. But he hasn't done anything wrong. But after three days, he was risen from death. But, why did God let his son be killed? Because Jesus died, he took our punishment. He was punished for our mistakes. Because of this and because he defeated death by rising from it, we don't have to be punished and we all can go to heaven after death.
To praise Jesus in my own way, I made this little grave with Jesus rising from it. But, whatever you celebrate at easter, have fun!