Bubble, Fizz, Pop: Five Cinema-Inspired Science Tricks for a Very British Kitchen

The movies have a lot to answer for. On screen, science is either a lightning strike in a castle or a countdown in a bunker. In a British kitchen, science is more likely to involve a washing-up bowl, a slightly damp tea towel and someone saying ‘don’t put that down the sink’. This list takes five classic on-screen science moments and translates them into safe home demonstrations. The rule is simple: do not try the movie version at home. Try this instead.

The physics teacher’s blessing

I have consulted the spirit of a physics teacher. She says: use a tray, wear splash goggles if anything fizzes, keep electronics well away, supervise children and never taste an experiment. She also says the best demonstrations are the ones you can explain afterwards. That is the blessing. It is not a licence to recreate a film explosion. It is a licence to be curious with a tea towel ready.

1. Cornflour slime — inspired by The Blob

The film: The Blob, the 1958 B-movie classic, gives us a goo that oozes, glops and refuses to behave like a normal liquid. The science: cornflour and water make a non-Newtonian fluid. Stir it slowly and it flows. Punch it and it feels solid. The particles lock together under force and slide past each other when left alone.

The kitchen version: put a few tablespoons of cornflour in a bowl and add water a little at a time until you get a thick, reluctant paste. Food colouring is optional; so is the dramatic screaming. Safety notes: keep it in a bowl or tray, do not pour it down the sink because it can block drains, and wipe up spills before they become a floor-based skating rink. Curriculum link: KS2 materials and their properties, KS3 states of matter and forces. Where to stream the inspiration: The Blob is a rental or archive-streaming regular; check JustWatch for current UK availability.

The movie version: do not chase anyone as a giant goo monster. The clean-up is terrible.

2. Cartesian diver — inspired by The Abyss

The film: The Abyss dives into deep-water pressure, buoyancy and the kind of underwater equipment that would never fit in a kitchen. The science: a Cartesian diver shows how pressure changes the volume of air trapped in an object, which changes its buoyancy. Squeeze the bottle and the diver sinks; release and it rises.

The kitchen version: fill a plastic bottle almost to the top with water. Take a small, partly filled condiment packet or a pen cap with a little plasticine, so it floats just under the surface. Put it in the bottle, screw the lid on tightly and squeeze the bottle. Safety notes: use a plastic bottle, not glass; do it over a tray; do not over-squeeze; watch for leaks. Curriculum link: KS2 forces, KS3 pressure, density and floating and sinking. Where to stream the inspiration: The Abyss is available on some streaming services and rental platforms; check UK listings before you dive in.

The movie version: do not attempt deep-sea diving in the kitchen. The dishwasher is not a pressure vessel.

3. Film-canister rocket — inspired by October Sky

The film: October Sky follows young rocket builders who learn that launch, failure and recalculation are all part of the same job. The science: an effervescent tablet and water produce carbon dioxide gas inside a small container. The pressure builds until the lid pops off, pushing the container upwards.

The kitchen version: use a plastic 35 mm film canister if you can find one, or a small plastic tube with a push-fit lid made for this purpose. Quarter-fill it with water, add half an effervescent tablet, push the lid on firmly, place it lid-down on the ground outdoors and stand back. Safety notes: eye protection, outdoors only, adult supervision, stand at least two metres away, never aim it at anyone, do not use glass, do not use more than one tablet. Curriculum link: KS2 forces, KS3 chemical reactions, pressure and unbalanced forces. Where to stream the inspiration: October Sky is a rental favourite; check JustWatch for UK options.

The movie version: do not build a full-size rocket in the shed. The shed has enough problems.

4. Red cabbage pH indicator — inspired by The Andromeda Strain

The film: The Andromeda Strain, the 1971 science-thriller, is full of lab tests, sealed rooms and people peering at samples with serious expressions. The science: red cabbage contains pigments that change colour with pH. Add it to vinegar and it goes pinkish-red; add it to bicarbonate of soda and it goes blue-green. It is a kitchen-friendly acid-alkali test.

The kitchen version: chop a few red cabbage leaves, soak them in hot water from the kettle, let it cool and strain the liquid into cups. Add a spoonful of vinegar to one cup and a spoonful of bicarbonate of soda solution to another. Safety notes: adult help with the kettle and chopping, do not taste anything, keep it away from eyes, and accept that your kitchen will smell like cabbage for a while. Curriculum link: KS3 acids and alkalis, pH, indicators and working scientifically. Where to stream the inspiration: The Andromeda Strain is a rental or archive-streaming title; check UK listings.

The movie version: do not handle unknown alien samples. Start with vinegar. It is safer and better labelled.

5. Potato osmosis — inspired by The Martian

The film: The Martian turns survival into a series of practical science problems, including growing food in an unforgiving environment. The science: osmosis is the movement of water across a partially permeable membrane from a dilute solution to a more concentrated one. A potato in salt water loses water and goes limp; a potato in fresh water stays firmer.

The kitchen version: cut two similar potato chips with adult help. Put one in a cup of water and one in a cup of very salty water. Leave for half an hour, then compare how bendy they feel. Safety notes: adult help with the knife, do not eat the experiment, keep salty water away from cuts, and label the cups so nobody mistakes them for snacks. Curriculum link: KS3 cells, osmosis, diffusion and the movement of water in plants. Where to stream the inspiration: The Martian is available on streaming and rental platforms; check current UK availability.

The movie version: do not attempt to farm potatoes in a Martian habitat. Your kitchen has enough atmosphere already.

The kitchen lab partner test

The best film science is not the biggest explosion. It is the moment you think ‘I could test that’. These five demonstrations are not the movie version, and that is the point. They are the kitchen-table version: smaller, safer, cheaper and explainable to a neighbour who pops round for tea. Put on the goggles, lay down the tray and let the experiment be the drama. The physics teacher’s blessing is with you — just don’t tell her about the cornflour on the ceiling.