According to the NPD Group’s Insight Into the Youth Beauty Market, “tween” girls—those between the ages of eight and 12 years old—first start using beauty products at the age of 10 and may use more than two dozen different beauty product categories. The majority of what they are using includes fragrances/body sprays, body washes/cleansers/gels and lip products, like lipgloss and balm. While scents sales overall have been challenging in the prestige and mass markets, NPD reports that the frag...