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::: sugar chalk


There are quite a lot of activities children can do with chalk, such as drawing and writing on blackboards, tracing around shadows, creating patterns on the pavement, paper and card. Our children have made paint with them and sand can be coloured with chalk as the basis.

One of the beautiful properties of chalk is its softness and ease of smudging.

Albert Einstein

When we adults were young our teachers used the blackboard to pop all the day’s work up onto, but there was information that needed to stay up there for a while and not be smudged. The teachers trick?

To soak the chalk in sugared water before using it.

Our children tried it out by mixing 1/3 cup of sugar with 1 cup water until the sugar had dissolved.

They placed their choice of chalks into the solution for about 10 minutes. They were very surprised at the amount of air bubbles which emerged from the soaking chalk and also the fizzy sound emanating from it. Who knew that chalk was so full of air?

After the 10 minutes were up, the chalk could be used straight away. They chose either black or white card and it was effective on both.

They were fascinated when their drawings dried at how permanent they were and how no smudging occurred even when they tried to rub them off!

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4 Responses to “sugar chalk”

  1. avatar jeanne says:

    I’ve never tried this with chalk! Thanks for your irresistible idea :)

    ::: We’d never tired this before either Jeanne but gee it worked well! :) :)

  2. avatar Wendy Crislip says:

    What a wonderful tip, and a great science activity. I’ve always resorted to hairspray after the fact.

    ::: Ahhh the old hairspray trick Wendy?! … We reckon you’ll find this is a very good option! :) :)

  3. avatar Louise says:

    Thankyou for this very useful idea – I have wondered whether some vigorous children drawing with wet chalk might be even more likely to snap the stick – but you didn’t find this to be a problem?

    ::: Oh Louise that ALWAYS snap the sticks! It was only in the water for 10 minutes so it wasn’t soggy to use … Luckily chalk is one of those mediums that works and works no matter what!! :) :)

  4. avatar Emma says:

    this is great! how long would it stay on pavement?

    ::: Emma we haven’t tried it on the pavement, so if you do, please be sure to let us know. :) :)

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