Oobleck is one of those science crafts that kids seem to absolutely love. If you are a crafty mum then this is well within your range, but this is also one of those activities for kids that you won’t really don’t mind kids doing at home either way. It’s very similar to slime and playdough, but far easier to clean up afterwards. Let’s explore Oobleck in a little more detail first.
So what is Oobleck?
Oobleck is a non-Newtonian fluid which means that it does not follow Newton’s law of viscosity, making it completely different to water. It is a thixotropic fluid that changes its viscosity when the forces and pressure on it change to be either more liquid or more solid.
Other examples of non Newtonian fluids are:
- Ketchup, think about how sometimes you can’t get the ketchup out of the bottle, but if you squeeze the bottle, it comes out.
- certain components of cement (so it can be used to fill potholes)
- Some dough & puddings.
Oobleck Recipe: How to make it
Oobleck is simply a mixture of cornflour and water, which makes it really easy to incorporate into a science experiment at home as it’s so easy to make. To make it look and smell more appealing, you can always add food coloring, glitter, and even diluted essential oils to give it a scent. We’ve given you a simple Oobleck recipe though, to get you started.
Before you start, I would suggest that children wear old clothes when making Oobleck because it can mark clothing, especially if you’re adding food colouring to it.
The ingredients of Oobleck are very simple. It is 1 heaped cup of cornflour or cornstarch mixed with ½ a cup water. Be careful which cups cornstarch goes into too – as it can be difficult to clean them when you are mixing it all up. Maybe use an older one if you can.
- Add the cornflour to a bowl
- If you’re going to add food colouring to the mixture, add it to the water and mix well. Then add the water to the cornflour in the bowl.
- Mix it together using a spoon, spatula, whisk, or even your hands.
You might need to add more cornflour or water to the mix, just go slowly and keep mixing. Trust me, you’ll know once you have reached the right consistency.
Here is a simple Oobleck recipe card for you as well:
- Heaped cup of Cornflour or cornstarch
- 1/2 cup of water
- Food coloring or glitter if you want!
- Add the cornflour to a bowl.
- If you're going to add food coloring to the mixture, add it to the water and mix well. Then add the water to the cornflour in the bowl.
- Mix it together using a spoon, spatula, whisk,
or even your hands, and
- Believe it or not - that. is. it!
This is a really simple recipe - which is why it is only three steps. Kids love it, it is easy to do, what more can you ask for?
How to dispose of Oobleck
Once you and the children have made and finished playing with your Oobleck, you can keep it in a sealed container for about 24 hours. If you want to use it the following day and it’s gone a bit hard, slowly add a bit more water to it.
However, it doesn’t really last much longer than that. We would suggest that you dispose of it in the dustbin because it’s not great for the drains to dump that amount of cornflour down them. However, don’t worry about the washing up, because as we’ve seen, when cornflour mixes with too much water, it simply drains away. This is what makes cleaning up Oobleck so easy. You can either sweep it up or wipe it clean with a wet cloth. Or both.
After throwing the Oobleck in the bin, simply wash up as usual, and the mixture residue will simply drain away.
As you can see, it’s effortless and easy to make Oobleck, and it’s equally easy to clean up. For that simple reason, you won’t mind if the kids want to make Oobleck every weekend!
We hope you liked this Oobleck recipe – why not experiment with essential oils, and coloring as well as glitter to get creative with it!
If you liked this activity – why not try some more ideas from the site?
You could try these too:
If you like this activity, do check out Mom of Two Little Girl’s website as well – and have a look at our newsletter too.
Thanks so much for coming to see us as always, and be back soon.