METHOD:

1. Pour dry breakfast cereal onto a surface and crush into a powder with a rolling pin.

2. Put your magnet into the cereal dust. Carefully lift the magnet and you should see that tiny pieces of cereal are gripping the magnet.

3. Pour one to two bowlfuls of breakfast cereal into a transparent food bag. If the cereal hasn’t already been crushed, crunch it up with your hands. Pour in enough water to completely cover and saturate all the cereal.

4. Seal the bag and squash all the pieces until it is a smooth consistency, like thin soup. Put the magnet on the surface and place the bag on top. Agitate the bag so the cereal has a chance to be near the magnet. Leave it to rest for an hour.

5. Carefully lift the bag, taking care not to shake it, and raise the magnet to keep it touching the same spot on the bag. Look closely: you should now see a small patch of dark iron powder next to the magnet. Move the magnet across the surface of the bag to drag the iron particles around.