You do not need any materials, yet you may want to have a pencil and paper handy in case you want to take notes.  Optionally, plan to have some room around your area if you would like to do a flexibility activity toward the end of class.  No exercise is required.

學習者無需使用標準 Outschool 工具以外的任何應用程式或網站。

While I would not consider these two things mature content, I am sharing them here in case anybody is sensitive to these topics.  

I will share about how water helps us go to the bathroom and how lack of water can make it difficult to go to the bathroom.  I will talk a little bit about calories and about how people who drink more soda and less water are more likely to gain weight and why this happens.