How to make gloop - an easy 2 ingredient sensory play recipe

Making gloopy gloop (or slime, goop, oobleck or whatever you like to call it) is soooo much fun! Gloop is really easy to make using just 2 ingredients, cornflour and water. It is an extra messy sensory activity for kids and it is fascinating to see how the mixture changes from a solid to a liquid as it is played with. 

How to make gloop (also known as goop, oobleck or slime) and play with it on a tuff tray.  a great sensory play idea for toddlers and preschoolers.

If you would like to do more gloop activities with your child take a look at our frozen winter gloop, our dinosaur swap made from gloop and our frozen fish sensory play.



Gloop Recipe


To make gloop you will need:



  • Cornflour (cornstarch) 
  • Water 
  • Bowl 
  • Food colouring (optional) 
  • Tuff tray (optional) (UK link
  • Kitchen items e.g. spoons, cake cases, cutters, measuring spoons & cups 
  • Paint scrapers are fun to use too (UK link)


How to make cornflour gloop directions



To make gloop all you need to do is mix cornflour (or cornstarch) and water together at a ratio of 2:1.  

Don't worry about the measurement being too exact, it's quite fun to experiment with adding more or less cornflour or water to see how it changes the mixture. 

How to make gloop


It can be fun playing with the cornflour in a bowl whilst it is dry before slowly mixing in the water. It will be quite hard to mix the two ingredients together as the cornflour goes hard as you try to mix it, but kids will love this and find it fascinating. 

How to make gloop (also known as goop, oobleck or slime) and play with it on a tuff tray.  a great sensory play idea for toddlers and preschoolers.


Playing with gloop in a tuff tray


Once you have made your gloop (or gloopy gloop as Harry aged 3 calls it)  pour the gloop into a tray. We love using our huge tuff tray, but this recipe works well on a smaller scale too. 

Experiment with adding colour to your gloop. We added a few drops of food colouring to our white gloop once it was in the tray. Harry loved watching the colour spread out into the gloop and got quite excited about it.   

Add a selection of items from the kitchen (spoons, cake cases, cutters, measuring spoons & cups) to the tray. 

How to make gloop (oobleck)

Harry used the spoons, measuring cups and his hands to try and pick up the gloopy gloop. He loved watching the mixture moving back together after he had made holes in it. He picked it up and let it trickle out of his hands. 

gloop recipe for sensory play

He used the scrapers to make tracks and spooned the mixture into the cake cases to make gloopy gloop cakes. 

How to make gloop (also known as goop, oobleck or slime) and play with it on a tuff tray.  a great sensory play idea for toddlers and preschoolers.

Before long Harry was sitting in the gloop and covered in it! He played with it for nearly an hour and by the time he had finished the cornflour had turned back into a powder (which helped with the cleaning up as it was easily brushed up.) 

How to make gloop (also known as goop, oobleck or slime) and play with it on a tuff tray.  a great sensory play idea for toddlers and preschoolers.

Harry chatted away to himself (as he always does) throughout this activity and he really used his imagination.  The gloop became cakes, ice and soup! He loved playing in the gloopy gloop so much he has already asked to do it again tomorrow!

Check our our other sensory play activity ideas too. Have fun making and playing with this fun gloop recipe. 

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