Cheerios

Cheerios is a brand of cereal manufactured by General Mills in the United States, consisting of pulverized oats in the shape of a solid torus. In some countries, including the United Kingdom, Cheerios is marketed by Cereal Partners under the Nestlé brand; in Australia and New Zealand, Cheerios is sold as an Uncle Tobys product. It was first manufactured in 1941 as CheeriOats.

She first appears from the 1960s featuring with her partner Cheerios "Kid". The basic premise of each commercial is that they are doing something together, trouble appears, Sue needs help, the kid eats Cheerios which acts like spinach giving the kid Cheerios powered muscles, he saves Sue, and life goes on. Until noticed that the commercials ran into the 1980s. Somebody decided it was Sue's turn to join in the fun so, here's the Cheerios Kid and Sue BOTH eating Cheerios and both getting buffed up!

1986 Cheerios commercial (Tornado)
Kid and Sue in a barn. One of them shows off their Cheerios strength by taking a twister and tossing it away.

1988 Cheerios commercial (Evil Yeti)
Cheerios Kid & Sue battle an Evil Yeti  (aka  Arctic  pachyderm)