Demeter cared for her daughter so much. She would always bring her to Earth when she went and let her wander around the fields, picking flowers and dancing.
One day, Persephone, Demeter's daughter, wandered off too far. She found a flower and decided to pick it.
All of a sudden the ground started to shake and crack and all of a sudden, Hades came out of the underworld and too Persephone with him off of Earth and back down the the underworld.
Hades mad Persephone the new queen of the underworld. He tried to cheer her up by offering her jewels and food but she refused to take the jewels or eat the food
Demeter because so sad about loosing her daughter that wherever she walked, the flowers died and winter came
Demeter sent Zues down to the underworld to get Persephone. Hades made a deal saying that she has to spend half of the year in the underworld and half of the year on Earth with her mother. Thats how the seasons were made.