Rephrasing some of the comments below, if you are looking to avoid the effects of a candy or a soft drink, you should avoid fruit juice - eat the whole fruit instead, that's actually healthy. Blending fruit makes the entire sugar content immediately available to your digestive system, causing a spike in the glycemic index (aka the level of sugar in your blood), which has unhealthy consequences.

I am actually not sure if a candy has enough sugar to cause a spike in an adult, but I imagine the threshold would be lower in a child. Not to mention, children don't understand the meaning of addiction: they just want (more) candies and you had better oblige or else!