In the very beginning, There was an egg floating in the water.
When the egg hatched, Ra was born. He flew into the sky and became the sun.
Ra turned the water into land and made a wife and children. Eventually, he became a father, grandfather AND a great-grandfather!
Out of all his children, Ra liked Osiris (his grandson) the best. Ra made Osiris the first pharaoh of Egypt, Osiris then married Isis and had their child Horus.
Osiris had a brother, Set. Set was extremely jealous that Osiris was the pharaoh, In fact he was so angry that he killed Osiris, chopped his body into little pieces and threw them in the Nile.
Isis soon heard what Set had done and managed to collect the pieces of Osiris' body. With the help of her friend Anubis (the jackal-headed god), Osiris was put back in one piece again, but he couldn't bring Osiris back to life again.