Moses went to Pharaoh and said, “God is not happy with the way you treat the Jewish people. God chose a man named Moses to lead the Jewish people. They built palaces and cities and worked without rest. Every day, from morning until night, they hammered, dug, and carried heavy bricks. As slaves, the Jewish people worked very hard. Worried that the Jewish people would one day fight against him, Pharaoh decided that these people must become his slaves. A mean and powerful king, called Pharaoh, ruled Egypt. The first Passover happened long ago in the far-away country of Egypt.
For another take on the story, you can also listen to the short Passover mini-sode of PJ Library's podcast, Have I Got a Story For You!
This short, adapted version of the Passover story conveys the main themes and plot points of Exodus in an easy to understand, child-friendly, manner.