Not so secret mix.

Dr Hubble uses different mixtures for different tricks but here is a recipe that will work well for kids at home and at school.

4 litres of warm water

1 cup of Fairy dishwashing liquid – or purple Palmolive if you can’t find Fairy

2 tablespoons of glycerin

2 tablespoons of baking powder ( this balances the ph of the mix, its not necessary when your water is fairly pure, Melbourne water is Ok)

1/2 teaspoon guar gum ( this will help bigger bubbles to hold together) 

Mix the guar and glycerin first, then add detergent then water. It will work straight away but it will be stronger if you let it sit over night.