Mattel Inc. (NASDAQ:MAT), the manufacturer of Barbie dolls, has been accused of stealth marketing in schools through its 'You Can Be Anything' program, according to a report in the British Medical Journal. Critics argue that the program, which involves Barbie-themed events and teaching materials, serves to subtly promote the brand. Health experts have raised concerns about the potential impact of such marketing tactics on children's health and well-being.