For the last several months, my 3-year-old daughter Annika has been on a steady diet of waffles, yogurt sticks and milk...I had purposefully avoided putting too much pressure on Annika to eat a wider variety of foods because I thought that might backfire and make things worse. I also figured she would branch out eventually, as my older daughter had. But a new study, published in the journal Pediatrics, made me wonder if I should rethink my strategy.