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97-
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Learning scientific energy conversion ( power experiment combination )
Experimenting with various substances transformation instead of electricity, energy saving, experience science fun. (can use the apple, soil, water and other natural materials to convert the energy, keep the lights on, play music, as the clock to provide electricity and so on. You can also try to use fruit juice, vegetable, coins and other instruments to find and create more unusual electric energy.
China supplier:
Email : fangzhengcn@hotmail.com
Skype ID : chanceller819
http://chinagift.en.ecplaza.net
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