glass of water about 1/2 full
Add 3 TBSP of baking soda and mix a little.
Add about 4-5 raisins to the glass of water.
Add 4 TBSP of vinegar and give it a few minutes to start working.
The raisins should start dancing.
We also tried it with just mineral water and placing some raisins in a glass with it and it did work as well.
We firstly tried this with sultanas but they didn't work, so next we tried it with raisins and it worked extremely well. They boys loved watching the raisins going up and down.
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