Controversy flares over tot teachers conducting research

Two 4-year-olds wearing apple and banana costumes sing and dance to a nursery rhyme in an animated impersonation of fruit they are dressed as.

"I helped them dress like fruit for a role-play game," said Liu Fang, a 28-year-old teacher at a major kindergarten in Beijing.

"It's not just a game, I want to teach them to recognize different fruit."