飲水鳥
飲水鳥是一種世界流行有名的物理玩具, 亦是一種很好的小擺設. 它不用上鍊, 電池, 而是用一小盅水作為 "動力", 供鳥連續 "飲用", 擺動三四晝夜. 這一玩具包含了蒸發致冷, 飽和汽性質, 毛細管作用, 重心和穩度等多種物理原理. 附說明書及實驗方法，讓老師詳細解釋其原理．

DRINKING Bird
Bird can drink water automatically, its head dip and rise due to capillary action .
Made of glass & plastic, light weight and beautiful. Your student must feel very funny and interesting in studying your science lessons.
Item no : JHL 650

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