Reflection on how to make ping pong ball fly high

Shumin:
By using simple material such as 2 piece of A4 size paper, a pair of scissor, 1 ping pong ball, 1 balloon and a row of tape. We can conclude that the the longer the paper is being rolled and the amount of air released in the balloon will not make the ping pong ball fly high, so we decided to make the paper shorter and released that the ping pong ball flew higher. This is because the amount of air released from the balloon and into the shorter paer holder is of a shorter distance travelled as compared to the longer paper holder.