14種視頻 (1)溶解過濾 http://www.tudou.com/programs/view/Ba7uPHd5jwQ/ (2)種子發芽 http://www.tudou.com/programs/view/BGxK_huwRAk/ (3)指南針 磁懸浮 http://www.tudou.com/programs/view/ddU7As5doRE/ (4)水輪車 http://www.tudou.com/programs/view/zU-ELWTyfvI/ (5)小孔成像 照相機成像 http://www.tudou.com/programs/view/HdIt8A35xxg/ (6)滑輪 測力器 http://www.tudou.com/programs/view/3SvbFpLrfCg/ (7)平面鏡 光 http://www.tudou.com/programs/view/NO7-4n-GHZ0/ (8)摩擦力 輪子省力 http://www.tudou.com/programs/view/f-G0zSAIpWA/ (9)紅綠燈 http://www.tudou.com/programs/view/l5OWsTLoUYA/ (10)杠桿 天平 http://www.tudou.com/programs/view/5aIl1AF9o4c/ (11)風力風向 http://www.tudou.com/programs/view/fq-CDGni2jQ/ (12)齒輪 皮帶輪 轆轤 http://www.tudou.com/programs/view/cuE3K-ZEww0/ (13)電路 http://www.tudou.com/programs/view/s8QM39ykq-k/ (14)電磁鐵 http://www.tudou.com/programs/view/xq-_i1EZdfU/