my brother grew up with mostly girls in the house (my grandma, mother, sister, and I) and liked to dress up in our costumes and paint his nails and wear makeup because that is what he saw at home; he often went to school with nail polish and he did not have many friends as a young kid, he also is very musical and many of my classmates in. elementary school expressed that they thought my brother was gay.
My 6-year-old son wanted to wear a sparkly purple backpack to school. He loved it and had picked it out himself. On the second day, he came home and asked me to return it — some boys said it was 'for girls.'
My 8-year-old daughter played on a coed soccer team and was one of the stronger players. The boys kept telling her she 'runs like a girl' and wouldn't pass to her during practice, even when she was open.