Individual Reflection - By Guo Ren

Personally, I believe that our group have think to hard when what was needed was just a simple trick.
Ironically, thinking straight and formally didn't allow us to get the correct answer, stupid ideas (by me) actually worked.

So what actually worked is that having a cone shaped paper and the ping pong ball in it, and having the balloon's outlet to be directly below, just take note that the smaller end of the cone must not be so SMALL, and fit into the outlet of the balloon. If you do so, then it wouldn't work. make the smaller end just relatively smaller than the other end and allow the air from the balloon to push the ping pong ball. Due to limited papers, I couldn't conduct experiments to find the relationship of the height of ping pong ball pushed up by air, and the narrowness of the smaller end of the tube(cone).

Overall, it was a fun experiment, seeing everybody thinking hard, trying to get ideas to work etc.
And a fun note: We're the second group to be successful before all other groups became successful.