And don’t be concerned—it’s not a person but a flame-test dummy dressed in a firefighter’s uniform.) Whether it comes from candles on a birthday cake or a campfire on the prairie ...

1. Ask the adult you are working with to light the candle. 2. Watch the candle flame start out small and get bigger. Notice how some of the wax near the wick melts. 3. As the flame burns, the wax from ...