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Home » Science Experiments for Kids » Easy Play Dough Circuits

Easy Play Dough Circuits

Modified: Sep 10, 2022 · Published: Feb 12, 2015 by Emma Vanstone · This post may contain affiliate links · 9 Comments

Did you know play dough conducts electricity and can be used to make circuits?

Using play dough is a fun and very low cost way to learn about circuits and electricity.  In our circuit we use a component called a Light Emitting Diode (LED).  These are very easy and inexpensive to purchase from online stores or electronics shops.  Light emitting diodes light up when electricity flows through them (like light bulbs).  They only let electricity flow through them in one direction, so if you put them in the wrong way round, they won’t light up.

Our little activity show how you can make circuits of any shape you want using play dough.

conductive play dough with LEDs inside

Easy play dough circuits

Materials

Play Dough

Battery Pack:

UK: http://amzn.to/2dS9vCj

US: http://amzn.to/2dSberc

LEDs

Insulating play dough – make your own

Instructions

  • First make your play dough. For the insulating ( non conducting )dough we used this recipe from Squishy Circuits.
  • For the conductive dough we used a standard play dough recipe with salt. Or you can just use shop bought play dough.
  • The next task is to test your doughs,  set up a simple circuit like the one below and check the LED only lights up with the conductive play dough.
conductive play dough with an LED connecting the dough

Then you can get a bit more adventurous.

You can see in this circuit the gaps in the conducting play dough are completed by the LEDs.

Remember current can only go through an LED one way….

Series Circuit

In this circuit below the LEDs are arranged in series.  The positive leg of the LED is nearest the positive terminal of the battery (red lead).  A battery pushes electricity around the circuit.  It can only go through the LED one way (through the long leg and out the short leg) and we bridge the gaps with the LED.  It then goes through the play dough to the next LED, again it has to be the right way round.

In a series circuit the electricity can only flow one way around the circuit.

play dough series circuit
Play Dough Series Circuit

Parallel circuit

In the circuit below the LEDs are arranged in parallel.  Electricity flows again through each of the LEDs completing the circuit.  In a real circuit with more efficient wiring (play dough, while amazing is probably not the best way to carry electricity) you can see differences in how LEDs light up when comparing them in series and in parallel.

In a parallel circuit the electricity splits up and travels through the different branches of the circuit.

parallel circuit made with play dough
Play dough parallel circuit

Fun shapes and play dough circuits

Next we experimented with different shapes.  The middle layer in each of the shapes below is insulating dough which you need to allow the electricity to flow correctly around the circuit.

Conductive playdough

Another shape we made with our “sandwich” circuit.

play dough circuits

This video shows how we made our sandwich circuits.  We had to use a layer to insulate one of the legs from the other in the LED.  This is a little bit like how the circuits in your electronic toys work, we call them circuit boards.

We’d love to see what shapes you can make!

More Play Dough Circuit Ideas

This light up play dough snowman is super cute!

I love this light up rainbow from Lemon Lime Adventures too!

Why does play dough conduct electricity?

Play-dough contains salt dissolved in water, which conducts electricity.

The insulating dough contains sugar which does not conduct electricity.

More electricity activities for kids

Make a simple cardboard circuit. This is a great way to demonstrate circuits to younger children and very neat.

Drawing of a hedgehog with a circuit attached to light up the hedgehog nose

Draw a circuit with a graphite pencil. Did you know graphite conducts electricity?

Graphite Circuits - use a graphite pencil to draw a circuit and light an LED

Or, how about using your new circuit skills to make a homemade torch?

Collage of play dough circuits.
Play Dough Circuits

Contains affiliate links

Last Updated on September 10, 2022 by Emma Vanstone

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Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

Reader Interactions

Comments

  1. Trisha

    March 20, 2015 at 5:34 pm

    Very cool, Emma! What was the voltage on your battery pack?

    Reply
  2. Stu Edwards

    May 05, 2015 at 7:01 am

    Ha! The things you learn about play dough… It’s probably good that I didn’t know this when I was growing up 🙂

    Reply
    • brion

      February 01, 2017 at 1:44 pm

      fuck ye all ye fools

      Reply
  3. anus burger

    November 28, 2016 at 10:04 am

    ur shit

    Reply
  4. brion

    February 01, 2017 at 1:45 pm

    add me on psn cregan99

    Reply

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