- a large bowl with a flat bottom
- 2 different sized candles, one tall, and one short
- a glass half-filled with baking soda
- a bottle of vinegar
- With a grown-up's help, carefully put the lit candles and glass of baking soda into the bowl.
- Add vinegar to the glass of baking soda; the mixture will start to foam.
- Watch the candle flames flicker... and go out! Which one goes out first?
Which candle went out first?