Try Some of these Experiments

Experiment 1

Journey to the Earth’s Poles –
Make a Compass!

What you will need

  • 1/3 of a cork
  • A filled drinking glass of water
  • A sewing needle
  • An old steel spoon
  1. Take 1/3 of a bottle cork and float it on the water in the glass. Now take your metal sewing needle and rub it against a metal object, (such as an old steel spoon).
  2. Now gently place your needle on the floating cork. The heavier end of the needle will slowly change direction, naturally gravitating towards the Earths closest central pole (so if you live in the Northern Hemisphere it will point towards the North Pole but if you live in the Southern Hemisphere it will point to the South Pole).


By rubbing the needle against metal you are creating friction energy which builds up a magnetic charge. The Earth’s magnetic field is created by circulating currents of molten iron in the outer core at the central most rotational points.

So you have now discovered evidence of natural magnetic force and how metals are attracted to the largest of all metal masses located at our Earths Poles.

Well Done!


Experiment 2

5 4 3 2 1…  we have lift off –
Make an Alkaseltzer Rocket!

What you will need

  • 1 empty plastic camera film canister (35mm). Ask at your local camera store if you don’t already have one.
  • 1 Alka-Seltzer tablet (from a chemist or supermarket)
  1. Place the Alka-Seltzer tablet in the film canister.
  2. Add approximately 1cm of water.
  3. Fit the lid on the canister, making sure the seal is tight.
  4. Turn the canister upside-down and place it on a flat surface (lid side down). Stand back!


When water is added to the Alka-Seltzer tablet, bubbles of carbon dioxide gas are created. With the lid fitted tightly to the canister the gas builds up within this enclosed space. As more gas is given off the pressure inside the canister rises until there is enough force to blow open the seal of the lid. This build up of pressure is enough to shoot the canister into the air, forming the rocket.

We have lift off!


Experiment 3

Celery with Attitude –
Transform your own vegetable!

What you will need

  • 1 stick of celery
  • 1 glass
  • 1 tablespoon of water
  • 2 tablespoons of blue or purple food dye or plain beetroot juice (no vinegar)
  1. Pour the water and the food dye into the glass.
  2. Stand the celery in the glass and make sure the roots are covered by the mixture.

After a few days, as a result of this experiment, you will see that the leaves have amazingly changed to the same colour as the dye in the glass. 


Like all plants, celery needs water to survive. It sucks up any moisture it can feed from through it’s roots. This moisture travels through it’s veins and spreads it right the way throughout the plant to the ends of it’s leaves. You can watch how the moisture travels through it’s veins… a bit like how blood travels to feed a beating heart.