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Home » Holiday Science » Halloween Science » Fizzy Pumpkins

Fizzy Pumpkins

Modified: Oct 14, 2023 · Published: Oct 30, 2017 by Emma Vanstone · This post may contain affiliate links · Leave a Comment

We couldn’t resist making some mini fizzy pumpkins this week. These are super easy and such a lot of fun. Baking soda and vinegar reactions never get boring!

Baking Soda is alkaline and reacts with acids ( in this case vinegar ), releasing carbon dioxide ( a gas ) and water. It’s the bubbles of carbon dioxide that produce the fizz. For thicker foam, you can add a small amount of washing-up liquid ( dish soap ).

Fizzy pumpkins made with hollowed out pumpkins, baking soda, food colouring and vinegar

What you need to make a fizzy pumpkin

Mini pumpkins – or go large!

Baking soda

Vinegar

Food colouring

How to make a fizzy pumpkin

Spoon out the centre of your mini pumpkins and add a good amount of baking soda and food colouring. Add the vinegar when you’re ready and give it a good stir.

Keep adding vinegar and baking soda to keep the reaction going.

Fizzy Pumpkin Instructions
Fizzy pumpkin science experiment instructions

Extra Challenge

Find a way to make a thicker foam. Try adding dish soap ( washing up liquid ).

Take care with the food colouring as it will stain clothing and furniture.

fizzy, colourful baking soda potions in a hollowed out pumpkin for Halloween.

If you enjoyed this activity, don’t forget to try one of our other easy Halloween Science Experiments.

Last Updated on October 14, 2023 by Emma Vanstone

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Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

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