Do not like the common clock? This is a magic clock. It can work without any batteries or external power. Two potatoes or two fruits are enough to provide power. This magic clock will make you believe everything is possible. It is easy to use and the magic results can be shown immediately. This sounds so magic that it will blow your mind away.
There are four things in the package which are a digital clock, connecting lines, scotch tape, two test cups, four copper and zinkrod and a detailed introduction. It is made of environmental plastic material which is poison-free and odor-free. Its weight is 105g while its size is 0.7cm*3.3cm*0.8cm. You can make the experiment as the introduction with your child and experience the magic from two potatoes, fruits, or even two cups of water.