Boys vs. Girls--Sunshines

Before I had kids, I thought that each child was an individual, and didn't believe much in gender stereotypes in children. Little boys ran and jumped a lot because that's the kind of games they were taught. Little girls played with dolls because that was the kind of toys they were given. I thought that if all kids, regardless of gender, were exposed to the same things, they would have the same tendencies. Then I spent some time in the real world of kids and figured out that I was wrong. Possibly there were some differences between boys and girls. From time to time, I'm going to share some of my experiences that led me to this conclusion. However, so as to not bias you, I'm going to let you guess, who are the boys in the stories and who are the girls.
Today's Story

Wally was in kindergarten and we were visiting on parent's night. On the wall were pictures that the kids had drawn, and we noticed that several of them had a sun in them that was wearing sunglasses. Upon further investigation, we discovered that they were all drawn by one group of kids in the class. We thought this was interesting, but didn't think much about it until Theo was in kindergarten three years later. Then we saw the same thing--sunglasses on all of the suns in the drawings of one group.

You decide. Did the boys or the girls draw the sunglasses on the suns?

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I'm not sure what it means, but the girls were the ones drawing sunglasses on the suns.