फ्रूट पावर जेनरेटर
Gelsonlab HSTM-075 Education Science Toys फ्रूट पावर जेनरेटर Fruit clock
Through the फ्रूट पावर जेनरेटर, let the children know the phenomenon of electron flow formed by the replacement of copper, iron and zinc plasma with different materials in acidic or alkaline liquid.