Answer: the sun symbolises hope and life.
Explanation:
A description of the sun is "It was the color of flaming bronze and it was very large. And the sky around it was a blazing blue tile color. And the jungle burned with sunlight as the children, released from their spell, rushed out, yelling, into the springtime." It's the main description of it. Another one is Margot's poem about the sun "I think the sun is a flower,That blooms for just one hour.". She also said "it's like a penny".
Margot, who recalls the sun because she's not from Venus, she's from the Earth, is different from the other kids. She looks washed away and her colours had faded away, because of the lack of sunlight, she's like an old photograph. The rest of the kids are pale, because they have never ever seen the sun until that day.
When the sun came out, all of the kids except from Margot, who had been locked in a wardrobe, enjoyed and played under the sunlight, it seem that they had been released in freedom for the first time in their lives. They weren't empathetic before this moment, they only were capable of feeling guilt after they had seen the sun. No one cared about Margot until they knew what the sun was like, after they knew what real life was, with its real colours. The sun changed their lives, it meant life. It meant happiness. It meant hope, it gave them a reason to keep on living, because in seven years, they would see it one more time.
