A Mighty "Elizabeth Sweet, who researches gender and children's toys at UC Davis, says toy advertisements actually appeared to be the least gendered around 1975. She says, 'At the height of Childhood sexual behaviour at 0 3 years: parent education guide Childhood sexual behaviour at 4 6 years: parent education guide Finger to Thumb: What To Know About the Pincer Grasp 5 tricky times in boyhood that every parent needs to understand Maggie Dent