How to Make a Cube Soap Bubble
As they form, soap bubbles always minimize their surface area. Thus, floating bubbles are almost always spherical unless coaxed into other shapes. You can make cube soap bubbles by trapping air in the center of a special three-dimensional wand. Use the bubble-making process to teach your children or students about the properties of soap and surface tension.
Instructions
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Create the bubble mixture by combining 8 quarts of water with 1/2 cup of dish soap. Use a 5-gallon bucket that has a wide enough lid to accommodate the square bubble maker.
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Dip the square bubble maker into the solution. Hold an edge of the bubble maker so that your fingers are clear from the sides of the cube. Lift the bubble maker out of the bucket so that the soap solution creates walls on all of its sides.
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Shake the bubble maker gently so that the walls of the cube collapse but are still intact. You may need to attempt this several times to get the walls to collapse without breaking. The cube bubble should look as if each wall has been pinched into the center.
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Push a drinking straw gently into the center of the bubble so that the end rests on the surface of the soap wall but does not press through it.
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Blow softly through the straw to expand the bubble into a cube form. You may need to attempt this several times to get the right air pressure to expand the cube bubble without breaking it.
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Tips & Warnings
Gently poke a straw into the soap bubble cube and fill it with smoke. This will allow the cube to be seen better.
Avoid using dish soap that contains antibacterial products.
Mix the soap solution until there are no bubbles present. This will create a neater cube bubble.
Add a tablespoon of glycerin to make tougher and longer-lasting bubbles.
References
- Photo Credit bubble image by saied shahinkiya from Fotolia.com
