This is a classic experiment that we tried in science class when I was a child. Eric and I tried it at home, we used both the balloons and the hardboiled eggs just because we could. It’s kind of hard to find an old glass milk bottle, but our local grocer sells organic milk as well as chocolate milk in these old types of bottles so it wasn’t too difficult for us to find. If you have trouble finding the bottle, you could use one of those orange juice bottle. With those you’d definitely need to use the water balloon.
I absolutely LOVE Steve Spangler and so does my son. Remember, because this involves fire, parental supervision is a must.
Experiments with fire are fun stuff.