12 videos
【地球と宇宙】Earth and Space
Mr. Denjiro's Happy Energy!
14 videos
【ワザの科学】The science of various techniques
11 videos
【音楽の科学】The Science of Music
【遊び道具】Fun toys
13 videos
【不思議現象】Mysterious phenomena
19 videos
【古代の武器】Ancient Weapons
8 videos
【健康の科学】The science of health
【火起こし】Starting a fire
【家電のしくみ】How home appliances work
7 videos
【スポーツの科学】 The Science of Sports
【科学マジック】Science Magic
5 videos
【天才！テスラ】The Genius Tesla
【ロウソクの科学】The science of candles
【お家で実験】Experiments you can do at home
Mr. Denjiro's Happy Energy!
Mr. Denjiro's Happy Energy!
