Ever wondered why soap-and-water bubbles don't measure up to branded ones? Miranda Walker lets you in on the secret of bigger, stronger, shinier bubbles. Bubble mixture This recipe for bubble mixture is quick and easy to make with children. You will need: * 12 cups of clean water * One and a quarter cups of washing up liquid * 7 tablespoons of glycerine Take a completely clean washing up bowl or bucket, and pour...