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    Home » Halloween Fizzy Bug Rocks

    Halloween Fizzy Bug Rocks

    October 15, 2014 By Emma Vanstone 1 Comment

    My children always love a good baking soda activity with even my 7 year old still gets excited at the prospect of some fizzy fun. This took literally minutes to prepare and all you need is baking soda, vinegar and food colouring.

    You can see our original post here.

    Fizzy rocks made with baking soda for a Halloween science activity

    To make fizzy rocks you will need

    Water

    Bicarbonate of soda/baking soda

    Vinegar

    Food colouring

    Plastic bugs

    Instructions

    Mix some water with the bicarbonate of soda, I used a whole packet of bicarbonate of soda and just added water slowly until I had a very thick paste type mixture.

    Add a few drops of food colouring, mould into rock shapes with the bugs inside and leave to dry for a few hours.

    Once the rocks have hardened, add vinegar very slowly and watch as they fizz and dissolve. We used a pipette which is also great for helping with fine motor control.

    bugs hidden in rocks made from baking soda and water
    baking soda rocks

    More fizzy science experiments for kids

    Check out my full collection of baking soda experiments for enough fizzy fun to keep you busy for weeks!!

    Create your own monster tea party and investigate whether baking soda or baking powder is the fizziest!

    Monster tea party - baking soda potions pouring out of small metal tea cups

    Design and build your very own baking soda powered boat.

    A traditional baking soda volcano is always fun! Or, if you want to go all out, we LOVE this rainbow volcano from Hello Wonderful!

    easy baking soda volcano covered in cling film so it can be reused
    Image of coloured rocks made with baking soda and water with plastic bugs inside. rocks can be dissolved with vinegar.

    Last Updated on September 22, 2021 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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