The first mundane task that I thought of was brushing my teeth. How has it not been done before? Hmmm...certainly no one has used a Cheerio in place of a toothbrush, right?

Okay, it's a bit goofy. And it's not very easy to reach the deep recesses of my mouth with a Cheerio! But it could work in a pinch. About as well as my finger, anyway.