I hate to get argumentative in a thread where people are giving me free advice, but I think sugar is by far the worst thing we eat. Sugar as part of something is just as bad as straight sugar. Cheerios don't grow on trees with sugar built in to them. Sugar is added to them to make them tasty. Whether you add the sugar to your food personally or have someone else add it for you, it's still being ingested. For one thing, sugar is a straight carb that lasts about 2 seconds in your system, so it doesn't stave off hunger. Secondly it causes your body to overproduce insulin, which in turn causes your body to start storing fat. I think it's hilarious that everyone avoids eating fats because they don't want to get fat, as though cow fat is just transfered, in tact, to your thighs. Everything we eat is broken down and any fat on our bodies is created by our bodies. Americans are getting so fat because everything we eat is loaded with sugar (it is the third ingredient in Cheerios, for example).
Some sugars are, of course, worse than others, but just because your body can break the sugar down easily, doesn't mean it's okay. In fact, that's part of the problem.
And I agree with Saint. Sugar is damned tasty and would really like to avoid a situation where my kid refuses to eat something unless it's sweet - largely cos I consider obesity to be a character flaw and am disgusted by parents with obese kids. They're cruel, IMO.