- Scoop 3tsp of baking powder onto the centre of the tissue and then fold the tissue over to make a small parcel.
- Pour all the vinegar and all the warm water into the lunch bag. Then zip the bag up leaving a big enough gap to fit the tissue in.
- Put the tissue into the mixture, quickly zip the bag up and let the fizzing begin!
- Stand back and wait for the POP!
The science bit…
So, what causes all that fizzing and popping? Mixing the vinegar, the baking powder and the warm water together creates a chemical reaction (fizzzzz) which produces a gas called carbon dioxide. The carbon dioxide takes up a lot of space and the bag begins to expand almost like a balloon being filled with air. If the bag is not big enough? Well, that is your pop!!
Experiment even more…
You may find that on your first go you get a whole lot of fizzing and not a lot of popping. If this is the case try changing the amount of vinegar, water and baking soda. By altering these ingredients you are likely to see a different result. What happens if you use more tissue or no tissue at all? Record all your findings to see if you can work out what creates more of a fizz and more of a pop.