Our fizzy pumpkin cups are a easy fizzy science exercise for Halloween. We drew a pumpkin face on a plastic cup and arrange a baking soda and vinegar response within the cup. The orange foam fizzes as much as present the pumpkin face.
In the event you can hold the fizz contained in the cup, that is an nearly mess free science exercise that appears wonderful!
We used washing-up liquid/dish cleaning soap in one of many cups to see the distinction it makes to the fizz. You’ll be able to see the left cup is extra foamy than the precise.
Fizzy Pumpkin Cups
You may want
Orange meals colouring
Baking Soda
Plastic cups
Black marker pen
Vinegar
Water
Dish cleaning soap/washing up liquid
Directions
Draw a pumpkin face in the course of every cup utilizing a black marker pen.
Place a teaspoon of baking soda, a teaspoon of washing-up liquid/dish cleaning soap, and a bit of meals colouring into every cup, together with water. The precise quantities aren’t vital, in truth, it is enjoyable to experiment with totally different quantities of every to watch how the fizz adjustments.
Add about 20ml of vinegar and watch because the cup fills with orange foam!
Why does the combination fizz?
Baking soda and vinegar react to neutralise one another ( vinegar is an acid and baking soda is an alkali ), releasing carbon dioxide, which makes the combination fizz upwards!
The washing-up liquid/dish cleaning soap makes the fizz thicker and extra foam like.
Extra Fizzy Halloween Science Actions
Miss out the meals colouring and make a fizzy ghost!
Make fizzy rocks with hidden spooky surprises inside.
Create an erupting pumpkin lava lamp!
Make fizzy pumpkins!
Final Up to date on September 30, 2025 by Emma Vanstone
