Baking soda experiments have always been very popular with my children. They are such fun, fizzy reactions that can be used in many creative ways.
We’ve made baking soda ice before, but this time I added a little twist by making it Easter egg-shaped. We also made some without baking soda and hid a toy lizard for the girls to ‘rescue’.
Once you’ve made your fizzy easter eggs, don’t forget to take a look at my other Easter themed science activities.
Fizzy Baking Soda Eggs
What you need
Egg-shaped mould
Water
Food colouring
Small toy
Baking soda
Vinegar
Instructions
Add some food colouring to the water and pour into the moulds.
Add a tablespoon of baking soda to the ones you want to be fizzy.
Add a toy if you wish.
We played with the ice eggs first. I asked the girls how they thought they could ‘rescue’ the lizard. First, they tried hacking away at the ice using a spoon. When this didn’t work, they wanted to put it somewhere warm. I suggested pouring warm water over the top instead.
Once the lizard had been set free, we poured some vinegar over the baking soda eggs, which fizzed brilliantly.
This is such a fun and easy experiment, a great introduction to chemical reactions.
The science bit
Vinegar (an acid ) and bicarbonate of soda ( an alkali ) react to neutralise each other. This reaction releases carbon dioxide, a gas that causes the bubbles you see.
Other Baking Soda Experiments you might like
Fizzing rocks with baking soda
Last Updated on March 24, 2026 by Emma Vanstone
Baking soda and vinegar play with an Easter theme is on our to do list. I love all the fun you had!