You can lead school kids to water, but you can’t make them drink. A new study says kids will eat healthier foods if healthier school lunches are offered.

But the study stopped at the cash register, failing to address whether students actually ate the new food or threw it in the trash. Evidence supports the latter. Black markets for candy and soda often spring up when schools ban “junk” food.

And studies show that changing lunch menus doesn’t affect children’s weight. Why? Because kids don’t learn healthy eating habits from “forbidden fruit” policies. They learn by example – of their parents, not the lunch lady.