Some of the bottles had a small hole in, which meant that the air inside the bottle could move out of the way for the balloon. We also saw how hot air can have less pressure, which helped a water balloon to be sucked into a hot flask.
Our favourite part of the afternoon was making paper rockets. We investigated which adaptations made the rocket fly further and discovered that a nose cone and 3 fins made the rocket fly the entire length of the QMC hall.
We had a really good afternoon at QMC. Many thanks to the staff involved.