Marvin and Milo

Explore physics the exciting way, by trying out a simple and fun experiment. This month, Electric Slime Don't forget to check back next month for the next edition...

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What you need


Cereal fortified with iron


A bowl

A pestle or spoon



Put some of the dry cereal in the bowl and crush it as small as possible with the pestle or spoon.

Put a magnet into the cereal and shake the bowl a little.

Lift the magnet out – some cereal should stick to it. If not, try stronger magnets or other cereal brands. It should work with brands where the iron is present as fine metal particles or ferric oxide, as these are magnetic.

Results & explanation


The attraction isn’t strong enough to lift large flakes, as each contains only a few magnetic particles. In crushed cereal the magnet just picks up pieces containing magnetic particles – in these each particle has less cereal to lift.


Read more about magnetism on


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