When do you allow your pre schooler to experience junk food?

It all starts with their perception of what 'junk food' is. It's usually some sort of indulgence but kids can be trained early on to only crave what's good for them. Fortunately for parents these days, however, there are a lot of yummy healthy snacks to choose from. Some you can even make at home! Try this recipe: Healthy choco energy bites! http://www.yummly.com/recipe/Healthy-No-Bake-Chocolate-Energy-Bites-1556958?columns=3&position=4%2F52