Name: Making Chalk From Eggshells - Experiment For Kids | Play School: Science Time
Uploaded: 2026-01-25T13:19:13.000Z
Duration: 9 min 33 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

I've drawn the hopscotch course and now I'm writing in the numbers.

I don't have enough to finish all the numbers.

Chalk is hard and solid and when I draw with it, it leaves a mark on the ground.

I wonder if I make my own chalk from something that I can find around the house or garden.

I wonder if there's something inside here I could use.

For this experiment, you'll need eggshells, a mortar and pestle or an electric grinder.

Flour, water, food colouring and baking paper.

I'm thinking if I grind down these eggshells into a fine powder and then mix some flour and water, I could make my own eggshell chalk and finally finish the hopscotch course.

You just have to make sure that you've removed all of the membrane.

It's this thin film inside the eggshell that protects the yolk of the egg.

We don't need it for this experiment, so I've removed it and I just have to do one last piece.

It's very fragile and it might break, but if it does, you just keep going like this.

Now, you could use a mortar and pestle, but today I'm going to use this electric grinder.

So you'll need a grown up to help you with that part.

So in go the eggshells and on goes the lid.

The eggshells have been ground down into a fine powder.

Now, I just need these eggshells to have a chalky texture because we need to make it into a piece of chalk somehow.

So I'm going to mix in some flour and water.

And how about exciting some blue food colouring?

Maybe we'll make a discovery mixing up the eggshells.

Oh, just added a few more drops of water because we want the mixture to be like wet sand.

Now, I'm going to put it onto this baking paper.

And I know it doesn't look like a piece of chalk yet, but

I'm hoping that it will work like a piece of chalk.

And now we'll roll the baking paper like this, Put it down over and over and then fold up the ends.

And now we just wait for it to be completely dry.

Now, if you want to speed things up, you could get a grown up to help you and you could put it in the oven on a low heat.

But I'm not in a hurry, so I am going to find a nice sunny spot for this to dry.

I left the piece of chalk to dry for a few days and look, it dried into a solid piece of chalk.

Let's see if this eggshell chalk will work.

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Making Chalk From Eggshells - Experiment For Kids | Play School: Science Time

stick

eventually

fragile

experiment