God sent the wind and the fire and gave the disciples the ability to speak in different languages. He did this so all the people would know that God had decided it was time to start the church.
Peter wanted everyone to know that the man they knew as Jesus was the Son of God. People who belong to God's church believe that Jesus is God's Son.
What makes the church special? What special thing about Jesus do people in the church believe?
The Holy Spirit comes at Pentecost. Peter speaks to the crowd (Peter's Sermon).
As one child reads the Bible, let other children act out the Scriptures/Words from the Bible:
The Wind Blew.
The crowd listened.
"You crucified Jesus."
The crowd cried out.
"What do we do?"
The disciples preached.
"Come to Jesus."
The Church began.
Therefore, let all Israel be assured of this: God has made this Jesus, whom you crucified, both Lord and Christ. _ _ _ Acts 2:36
The apostles, filled with the Holy Ghost, and speaking divers languages languages, are admired by some, and derived by others.