材料准备：蜡烛，水，沙子，剪刀，卫生纸芯包好两头，其中一头扎一个小孔。透明盖子
课程步骤：
1 热身，what is a fire? What do we do with fire? Cooking? Warming? ....
2 light a candle. What shall we do to put out a fire?
3. Try using water, sand, scissors, and lid.
4. The Sound wave works well.
5. Let the children do it theirselves with their parents.
