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    Home » Primary Science » Key Stage 1 Science » How to make a square bubble

    How to make a square bubble

    February 5, 2017 By Emma Vanstone Leave a Comment

    Do you know how to make a square bubble? Bubbles are made from a thin film of soapy water filled with air. When you blow a bubble, the film of soapy water expands outwards to form a sphere. Whatever shape bubble wand you use you’ll always get a spherical bubble.

    You can test this by making your own bubble wands in different shapes. We used pipe cleaners and straws.

    different shaped bubble wands made with straws and pipecleaners

    So, how do you make a square bubble?

    It’s a bit of a trick….and is much easier than you think!

    Square Bubble - make a square bubble frame

    How to make a square bubble

    What you need:

    Materials to make a square frame – pipe cleaners or straws work well

    Strong bubble mix – this recipe from Red Ted Art is great.

    If you don’t fancy making your own bubble mix we highly recommend a mix from Dr Zigs.

    Instructions

    Create a square frame like the one in the image below.

    Square bubble - make a frame for a square bubble - easy science for kids
    Square bubble frame

    Dip your square frame into the bubble mix, so all side are covered in mix.

    Carefully lift out the frame and admire your square bubble.

    Why are bubbles round?

    The forces acting between the molecules of the bubble cause it to form the shape that encloses the most volume with the least surface area — a sphere. That is why when you try to blow a bubble through a shaped wand it still becomes a circle.

    Why do you see colours inside bubbles?

    Light from the sun contains a range of colours all with different wave lengths.

    These colours are:

    Red, Orange, Yellow, Green, Blue, Indigo and Violet

    When the light shines through the bubble film it is reflected and dispersed, which splits it into different wave lengths and showing all the colours.

    Why is the bubble square?

    The soap film sticks to all six sides of the cube, the bubbles on the side push against the middle bubble giving it corners and sides like a cube.

    You should notice however that the bubble isn’t a perfect square, it’s still trying to become a sphere and doesn’t have straight lines.

    More bubble experiments for kids

    Find out which drinks makes the best bubbles.

    Make a giant bubble!

    Or, find out why honeycomb is full of bubbles!!

    Last Updated on May 10, 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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