How did other children bully Margot?

The children in Margot’s class bully her because they are envious of her knowledge and memory of the sun. All the children are nine years old. The sun last appeared on their planet, Venus, about seven years ago, when most of them were only two years old. Thus, most of them cannot remember much about how the sun really looks or feels like. Margot, however, has been at Venus for only five years. Before that, she was living on Earth where she enjoyed the warmth of the sun to the fullest. Indeed, for the other children, her “biggest crime” is the fact that she remembers many things about the sun from while she was living in Ohio five years ago. The other children are angered by her descriptions of the sun. They refute her assertions that the sun looks “like a penny” or “a fire in the stove.”
Thus, the children bully her by shunning her presence in the circles. When they stand by the windows, waiting for the rain to stop so that the sun can come out as per the prediction of the scientists, Margot is found standing separate from them. During classroom discussions, when Margot presents her views on the sun, the other children dispute her stories as lies. The shove her and refuse to look at her. Finally, on the day when everybody is waiting for the sun to shine out, they lock her up in a closet so that she totally misses this epic moment.