Bottle Rockets this afternoon!

This afternoon we are testing our hypothesise, that we think the bottle rockets will fly best two thirds full. Most of us have our empty PET bottles ready, and Kian is the only one in the class who has fins on his bottle. Kian's hypothesis is that his bottle will be more aerodynamic than the other bottles, therefore, it will fly better.

If you want to try this, please have an adult around you!