4M Green Science Potato Clock: See Electricity Being Made

The 4M Green Science Potato Clock is a science kit that lets children build a working digital clock powered by potatoes rather than batteries. It solves a common challenge in teaching electricity: the concept can feel invisible and abstract. This kit makes it visible, using copper and zinc strips pushed into potatoes to generate a small electrical current strong enough to run a digital clock display.

How It Helps

Children assemble the copper and zinc strips, connecting wires, and digital clock unit themselves, then watch the display light up once the circuit is complete. Suitable for children aged 5 and over, the kit turns an electrochemical reaction into a hands-on project rather than a diagram in a textbook. Once built, the experiment can be repeated using other substances, such as soft drinks or juice, to compare results.

• Makes an invisible process, generating electricity through a chemical reaction, visible and understandable
• Encourages repeat experimentation by trying different substances in place of potatoes
• Straightforward assembly using copper strips, zinc strips, wires, and a digital clock unit
• Compact enough to build and display on a desk, kitchen table, or classroom bench
• Offers a reusable science project rather than a single-use activity

Building a working circuit and watching it power a real digital display gives children a concrete result they can point to, which helps make an electricity or chemistry topic more memorable than reading about it alone.

Whether used for a rainy afternoon at home or as part of a science topic at school, the Potato Clock offers a simple, engaging way to bring electricity and chemistry to life.

• Copper and zinc strips: generate a small electrical current through an electrochemical reaction with the potatoes
• Digital clock unit: displays the time once powered by the completed circuit, giving a clear, visible result
• Connecting wires included: link the components together to complete the circuit
• Repeatable experiment: can be tried again using alternative substances, such as soft drinks or juice, instead of potatoes
• Suitable for children from 5 years and up
• Brand: 4M, from the Green Science range
• Barcode: 4893156032751

• Makes a real clock run on potatoes. Children see an actual electrical current generated from a simple chemical reaction, not just read about it.
• Repeatable experimentation. The same kit can be used again with different substances, such as soft drinks, to compare results.
• Straightforward to build and display. Compact enough for a desk or kitchen table, with a clear result once assembled.
• Trusted STEM brand. Part of the well-established 4M Green Science range, known for accessible, curriculum-friendly science kits.

Care and Cleaning

Wipe the clock unit and metal strips clean and dry after use, particularly if experimenting with juice or soft drinks, to prevent residue build-up.

Safety and Age Suitability

Suitable for children aged 5 years and over. Contains small parts and metal strips with pointed ends. Adult supervision is recommended during assembly.

Delivery and Returns

Standard UK delivery applies. See our Delivery and Returns page for full details.

• What is the 4M Green Science Potato Clock?
  It is a science kit that lets children power a working digital clock using potatoes instead of batteries. Copper and zinc strips inserted into the potatoes generate the small electrical current needed to run the clock display.
• How does the potato clock actually work?
  Copper and zinc strips react with the potato to create a simple electrochemical reaction, producing a small electrical current. Connecting several potatoes together generates enough power to run the digital clock.
• What age is this kit suitable for?
  The kit is designed for children aged 5 years and over. Younger children may need adult help with assembling the strips and wiring.
• Do potatoes need to be bought separately?
  Yes, potatoes are not included in the kit and need to be supplied separately, along with the copper strips, zinc strips, wires, and clock unit that come in the box.
• Can other foods be used instead of potatoes?
  Yes, the same kit can be used with substances such as soft drinks or juice in place of potatoes, allowing children to compare how well different materials conduct electricity.
• Is adult supervision needed to build the clock?
  Adult supervision is recommended, particularly for younger children, as the kit includes metal strips with pointed ends used to pierce the potatoes.
• Is this a good toy for learning about electricity?
  Yes, the kit gives children a hands-on, visible way to see how an electrochemical reaction can generate real electrical current. Building the clock themselves helps make the concept easier to understand than reading about it alone.
• Does the kit need batteries?
  No, the digital clock is powered entirely by the electrochemical reaction created using potatoes or another suitable substance, not by batteries.