I’ve seen this several times and finally had to give it a try. As simple as it is, they were entertained over half an hour!
- cookie sheet or tray
- baking soda
- dropper (or straw or small spoon)
Step 1: Sprinkle baking soda all over a tray.
Step 2: Use a dropper, straw, or spoon to transfer vinegar to the tray
Step 3: Watch and repeat
So easy! Yet they loved it! They explored with holding baking soda on their hand while adding the vinegar to feel the fizz and played in the baking soda/vinegar paste, too.