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  • A D-Size battery
  • A piece of plastic coated electrical wire (about 10 cm long)
  • A scissors
  • Electrical tape
  • A small torch bulb
  • A small strip of aluminium foil

If you want to decorate it once it is made you will need some coloured paper, sellotape, marla and pipe cleaners etc.

1. First get an adult to strip a small bit of the plastic coasting off each end of the long and short wires. They can use the scissors to do this

2. Using sellotape, tape one end of the long wire to the flat end of the battery and secure it in place with more sellotape up the side of the battery.

3. Wrap one end of the short wire around the metal base of the small bulb, you want to make sure that the metal of the wire is in contact with the metal of the bulb base.

4. Now hold this bulb against the other end of the battery and use the tape to secure it all in place. Secure the two open ends of the wires in place too.

5. Scrunch up two small pieces of tin foil into two balls and secure one to open end of the two wires.

Now it is ready to go but you might like to decorate yours like this one…

All that is needed now is to test your conductivity checker… if you touch the tin foil balls off a good conductor, like a metal key you will complete the circuit and the bugs nose should light up. Try something like a pencil and you will find that nothing will happen.

Now you are all ready to go testing lots of different thing around your home to see if they make good conductors or not.

Ag Teastáil:


Do it at home

Do it at Home