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.

아웃스쿨 사이트의 기능 외 별도의 앱이나 웹 사이트를 사용할 필요가 없습니다.

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.