Easy oobleck recipe: make non

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Like Dr. Seuss" oobleck, non-Newtonian fluids get thicker as they are deformed, say by someone running across the fluid.(Image credit: apartment, Shutterstock)
Want khổng lồ have fun with physics & even "walk on water"? Try making a mixture of cornstarch và water called oobleck. It makes a great science project or is just fun to play with.

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Oobleck is a non-Newtonian fluid; it has properties of both liquids and solids. You can slowly dip your hand into it like a liquid, but if you squeeze the oobleck or punch it, it will feel solid. The name oobleck comes from the Dr. Seuss book, “Bartholomew and the Oobleck.” In the story, oobleck, a gooey green substance, fell from the sky and wreaked havoc in the kingdom.

Making oobleck is easy. Here"s a recipe:


Oobleck ingredients

1 part water1.5 khổng lồ 2 parts cornstarchSmall amount of food coloring (optional)

Mix ingredients


Start with the water in a bowl (or wading pool!) and địa chỉ cửa hàng the cornstarch a bit at a time.Keep stirring until it has a gooey consistency. You may want lớn use your hands.When the oobleck is just right, slowly showroom food coloring, if you want. This can be a challenge to get it mixed properly.Play with it.

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Things to do with oobleck

Grab a handful and squeeze it. Let it ooze through your fingers.Make a puddle & quickly drag your fingers through it.Put it into a plastic container và shake it or quickly bump it against a table.Jab at the oobleck & then slowly let your finger sink in.Roll some oobleck into a ball. It becomes solid, but when you stop moving it, it will melt back into your hand.

Some science projects use oobleck. Experiments you can try include:

Put some oobleck on an old speaker and watch it dance:


Tips

Store in an air-tight container. Phối occasionally.If you put in food coloring, you may notice a little bit of màu sắc left on your hands after washing. Don"t worry. It should go away in a day or two.Anything put into the slime can be washed with soap & water.To dispose of the oobleck, set it with a lot of hot water to lớn make a very loose slurry. Pour a small amount into the drain while the hot water is running.Oobleck when dried can be easily vacuumed.

Warnings

Don"t drop oobleck on a couch, deck, or sidewalk. It"s hard to lớn get off.Oobleck isn"t poisonous, but it tastes awful. Wash your hands after playing. Make sure children are supervised.Wear old clothes, as oobleck tends khổng lồ get messy.Don"t worry too much if it gets on something; it will come out with a little water.Lay a couple newspapers on the floor so it doesn"t get all over the floor or table.Oobleck may solidify if it"s not kept wet. If it hardens, just throw it away.If oobleck is left out too long, it will dry out và turn back to lớn cornstarch.

Related: Oobleck"s Weird Properties Demystified