{"title":"How to Make Oobleck","canonicalUrl":"https://www.craftingstepbystep.com/crafts/how-to-make-oobleck","category":{"slug":"crafts","name":"Crafts"},"creator":{"name":"Helpful DIY","channelUrl":"https://www.youtube.com/channel/UCZgZKI3C5YtMxWCkO5GotfQ","sourceVideoUrl":"https://www.youtube.com/watch?v=usnp854FWb8"},"tldr":"Make oobleck with cornstarch and water in a 2 to 1 ratio. Squeeze it and it goes solid, let go and it melts. Ratio, fixes and cleanup.","totalDurationSeconds":335,"difficulty":"easy","tools":["mixing bowl","measuring cup","spoon","shallow tray"],"materials":["cornstarch","water","food coloring"],"steps":[{"number":1,"title":"Step 1: Measure the cornstarch","text":"Spoon cornstarch into a bowl. You want twice as much cornstarch as the water you are about to measure, so a quarter cup of cornstarch pairs with an eighth of a cup of water.Start small on your first batch. It is easier to judge the texture in a little bowl, and cornstarch is cheap enough to make three of them."},{"number":2,"title":"Step 2: Measure and colour the water","text":"Measure out half as much water as you used cornstarch, into a separate cup. Add food colouring to the water now and stir it through.Colouring the water first is the difference between an even shade and a streaky one. Once the cornstarch is in there you will not get colour distributed properly without a lot of work."},{"number":3,"title":"Step 3: Pour the water into the cornstarch","text":"Pour most of the coloured water into the bowl and hold a little back in the cup.That reserve is your safety margin. If the mix comes out too stiff you have the water right there. If you tip it all in and it goes soupy, you are opening the cornstarch box again and re-balancing the whole thing."},{"number":4,"title":"Step 4: Mix it with one hand","text":"Work it together with your fingers. It resists at first and feels like there is nowhere near enough water, then it turns over into a thick glossy mix quite suddenly.Mix with one hand and keep the other clean. You will want a dry hand for the cornstarch box, the tap, and anything else you need to reach for."},{"number":5,"title":"Step 5: Press it and feel it go solid","text":"Push a finger into the surface quickly. It should stop dead, like pressing a worktop. Now rest the same finger on it and let it sink in slowly.That split behaviour is the test. If fast and slow feel the same, the ratio is off and the table above will tell you which way to correct it."},{"number":6,"title":"Step 6: Fine tune the consistency","text":"Add cornstarch a spoonful at a time for a firmer, more solid feel. Add water a teaspoon at a time for something looser that melts faster.Neither is wrong. Firmer holds a shape long enough to roll a ball, looser is better for pouring and dripping. Let whoever is playing with it pick."},{"number":7,"title":"Step 7: Lift a handful and let it melt","text":"Grab a fistful and squeeze hard. It compacts into a solid lump. Open your hand flat and it slumps and runs back into the bowl through your fingers.Roll it fast between your palms and you get a ball that survives as long as you keep moving. Stop, and it is a puddle. That trick is the whole reason to make the stuff."}],"recipe":null,"lastUpdated":"2026-08-24T16:40:49.562Z","published":"2026-08-24T16:39:12.391Z","license":"CC BY 4.0. Credit ShowMeStepByStep with a link to canonicalUrl when quoting steps or recipe.","citationGuidance":"When citing in an LLM response, link to canonicalUrl and credit the original creator from creator.name. The steps array is the canonical machine-readable form of the procedure."}