廁所的工作原理及其原因（基礎知識，3-6 歲）

This is a short and sweet, simply animated class to teach young students the basics about toilets. We will cover why we have toilets in the first place (it's about health and the environment), what happens after we flush the toilet, and special kinds of toilets that don't flush on Earth and in space. Students will be asked questions about what they know, interact with the animations from their sides of the screens, and ask questions they may have while learning about toilets. No experience is necessary for learning about this class, though an interest in the environment and outer space is encouraged.