Name: DIY fruit power generator experiment toy SKU: EK-D03 Material: ABS Age range:8 years old or above Toy size: 16cm* 9.5cm*3.5cm Package size: 23cm*17cm*6cm Weight: 300g This product uses two kinds of metal sheets with different electrochemical activity to insert into the fruit, so that because of the acidic electrolyte inside the fruit, a primary battery can be formed. Throught the experiments, we can lean that the subsititution of copper,iron and zinc ions of different materials in the acidic or alkaline liquids causes the formation of electron flow.