I find it interesting that adults designing 'educational' science/human body related material for children very often use grotesqueness or the 'gross out' as a framing discourse. These clips exhibit this tendency quite well I think.
This is a Canadian kids TV show called "Grossology"... speaks for itself really.
And below, a special 'gross out and learn' event. I'm not sure where or when it was, but it sure looks fun. I also love the phrase "the impolite science of the human body."