Soapy solution for blowing bubbles is sold in small plastic vials. A ring attached to a wand is dipped into the solution and then is blown through to create floating, shimmering bubbles in the air. Blowing bubbles rarely works with washing-up liquis and similar soapy materials because their composition isn't quite right. You need to add glycerin, which is used as a sweetener and liquid thickener in certain foods. That secret ingredient allows you to make bubbles of your own quickly and cheaply.
Fill a plastic bowl with 1.25 litres (5 cups) of distilled water. You can use tap water, but distilled water tends to make stronger, longer-lasting bubbles.
Add 125 ml (1/2 cup) of washing-up liquid and 60 ml (4 tbsp) glycerin to the water. Mix the ingredients gently but thoroughly; you want them blended, but you don't want to create suds.
Cover the bowl until you're ready to start blowing bubbles.
Twist a length of wire into a loop to make a bubble wand. You can also use discarded plastic bubble wands from shop-bought bubble bottles. The larger the loop, the bigger the bubbles will be, but larger bubbles pop sooner.
Open the lid and dip your wand in the mixture. Raise it to your lips and blow. Bubbles should come floating out.
If you don't want to use glycerin, substitute corn syrup. Like glycerin, the corn syrup allows the bubbles to last longer.
If you want to make coloured bubble soap, add a drop or two of food colouring to the mixture. Use such a mixture only outside because the coloured bubbles could leave stains on clothing and furniture.
As long as you keep the proportions of ingredients the same, you can make as much mixture as you like. A little bubble mix tends to go a long way, however, so don't go overboard. If you have extra bubble soap, pour it carefully into a plastic water or soft drink bottle, then cover it with a cap. It should keep well until the next time you want to use it.