Feature:

1. The magical potato clock uses a direct material conversion mode that allows the digital clock to be used without the need for a battery or any other external power source.
2. The Potato Clock uses a pair of ordinary spuds to power a digital clock.
3. This kit includes a digital clock, wires and prongs; two potatoes are all that's needed to create a working clock.
4. This kit is ideal for young science enthusiasts, and offers a valuable lesson on the transformative power of green science.
5. In addition to potatoes, you can use lemon, , tomato, beverages, etc. to provide energy, you can try to use any two to create a lot of unusual batteries.
6. Description
7. Cup Size: 6.5*5.2*5.2cm
8. Age Range:Over 6 years old
9. Material: ABS + Electronic Components
10.

Specification:

Cup Size: 6.5*5.2*5.2cm
Age Range:Over 6 years old
Material: ABS + Electronic Components

Package List:

1* LCD screen digital clock (with wire)
2* Experimental cups
2* copper metal strips
2* zinc metal strips
1* special transparent adhesive tape
1* take power Connection cable (length 21CM)
1* English manual.

How It Works:
1.The metal strips and potato make a simple battery that creates electricity to operate to operate the clock. Each potato works as a device called a electrochemical cell.It converts the chemical energy stored in the metal strips intoelectrucal energy.Two potatoes are needed to make electricity strong enough to run the clock. 
2.A cell works because of the chemical properties of the metals inside (in this case the copper and zinc).The different properties cause tiny particles charged with electricity .
(called ions) to move between the the two strips of metal. This flow is an electric current. The potato contains the particles that allow the current to flow,but it stops the metals touching.Electric current also flows along the wires between the zinc and copper strips and the clock. This current makes the clock work.
Put some soft drink into the pots provided.Insert the copper and zice plates into the pots, as shown in the diagram.
Taking care that the metal pates do not touch each other.The clock should now start to work.
You may experiment with different liquids like salt water,fruit juices. Or fruit like lemon, orange,tomato etc.The fun is unlimited.