Show notes
主題：Balloon-Powered Cars
班級：Class-J
單字：Lego(樂高), Create(創造), design(設計), powered(動力的), balloon(氣球), straw(吸管), rubber band(橡皮筋), aerodynamics(空氣動力學), resistance(抵抗性), weight(重量)
句子：
- Why do cars have certain shapes? (Because of …)
- Did a heavier car or lighter car go further? (A….)
- How can you increase the power of your car? (We tried…)