Step 1 You will need materials
equipment
Baking soda
2x cups
Tray
Vinegar
Step 2 when you got all that materials you put baking soda In one cup you to put a tray on the table doesn't go on the table.
Step 3 when you have put the baking soda in the cup you want to poor some vinegar with the baking soda.
Step 4 when you put the vinegar in the cup it will fizz and also it will have foam.
Step 5 The foam will despair
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