During his life Jesus teached, told parables, performed miracles,etc. Some people started to follow him and then crowds followed him. Then they started to call him Messiah and then other people got angry. Even though Jesus never did anything wrong people still hated him. They thought he wanted to become king. Then they planned to kill him. Over the time of Jesus's live he gathered 12 people and called him there disciples. They are like personal followers of Jesus. One day while Jesus was in the garden praying one of his disciples betrayed him. The guards captured him and then later sentenced him to death. He was crucified on across and died while his hands and feet were nailed to the cross) As Christian's we believe that Jesus died on the cross to save us from our deadly sins. There is a price to pay for our sins. And that us death. But Jesus died for us to save us from a enternal burning lake of fire, a burning hell. 3 days later he did something even more amazing he rose from the dead. So in summary Christianity is the belief of God's son Jesus coming to Earth saving us and raising from the the dead. But there is more to Christianity than you think. So much more. Like the Holy Spirit. We also believe that Jesus gave us the Holy Spirit to guide us to God. Then when we die we go to heaven and praise,worship and live with God until the end of the world. Even still there is so much more. God loves you. That is just my definition of Christianity.
I believe that Christianity is not a religion. It is a relationship.