balloon rocket on a string

We bought a science kit for our daughter about a year ago, I think. After doing a few activities in it initially, we have not done anything with it. Last weekend we dragged it out and did a couple things. Today we did it again.


One of the experiments was a balloon rocket, where we blew up a balloon and taped it to a straw. The straw was strung on a string, so when the mouth of the balloon was released, the balloon took off down the string. We had it set up from the kitchen, through the dining room, and into the living room, total about 10m. There was also a two-stage version, but that didn't work very well.


Empty balloon in the living room.