Here's a fun story originally reported by the BBC: researchers in Thailand have noted that not only do monkeys floss regularly, they pass this skill onto their little ones! This is a big story because teaching proper tool use to another, tends to be thought of as a distinctly human thing to do.
It appears that female monkeys will spend twice as much time flossing if their offspring is watching than if they aren't. It goes without saying (but...what the heck, we'll say it anyway) we should take the example from these monkey moms and be sure to teach our own kids proper dental maintenance!