On the soccer field we will set up a bottle of coke and a few mentos. The mentos create an explosion when put into the coke, because of safety precautions, we will pull a string from a far distance, making sure that the bottle doesnt explode on us.
also we will make sure the launch pad is secure so the bottle wont fire at anyone out on the field besides us.

the soda rocket can get up to 20FT high

we would like to use diet coke