Big Cereal has big ambitions. The makers of the sugary stuff that traditionally has fueled American breakfasts are setting their sights far beyond the bowl. You can buy coffee creamer flavored like Fruity Pebbles, ice cream (er, “dairy dessert”) that tastes like Lucky Charms and even a Frosted Flakes beverage. Now, you can also buy cereal formatted and packaged specifically for snacking. Akin to potato chips or pretzels, many of the new versions are essentially cereal, sized up or made into wafers, in bags that bring to mind their more familiar, salty counterparts. You can hardly blame the cereal wizards for busting their way past the cereal aisle like so many sugar-dusted conquistadors. People are eating cereal, lots of it, at all times of the day — that’s according to research by Post Consumer Brands, says Tom “TD” Dixon, the company’s chief growth officer.