
Being one to LOVE our cereal followed by our cereal milk, we kind of knew it, but this report by the Enviornmental Working Group solidifies the fact that most children's cereal contains a lot of sugar!
It's not until it's contextualized with hightlight such as:
"One serving of Honey Smacks has more sugar than a Twinkie." 
and...
"One cup of any of 44 children’s cereals – including Honey Nut Cheerios, Apple Jacks, and Cap’n Crunch – contains more sugar than 3 Chips Ahoy! cookies." 
That one begins to realize the ramification of what this all means especially with childhood obesity rates tripling in the past thirty years and recent research findings that suggest that products sweetened with sugar or high-fructose corn syrup food can be as addictive as cocaine or nicotine.
Eat and feed responsibly.
Download the full report here---> CEREAL REPORT