Arvind Gupta：Turning trash into toys for learning
TED 的介紹：https://www.ted.com/speakers/arvind_gupta YouTube 教學影片：https://www.youtube.com/channel/UCT7EcU7rC44DiS3RkfZzZMg...
Toys from Trash (YouTube)
YouTube 播放列表：https://www.youtube.com/playlist?list=PL3A74E2EA2D59A0F6 詳細介紹請參考：http://self-taught.weebly.com/lifestyle/arvind-guptaturning...