Download the Water bottle ... so that the plastic is designed to hold pressure inside it. Making a hole through the cork using a drill, punch or awl is a job for an adult. The rocket launches ...

It’s an automatic parachute deployment system that you build into the nose-cone of your rocket. The main portion of the build is made out of plastic soda bottles ... this line make up the ...

When you put the two of them together in a bottle, with a cork in the top, the carbon-dioxide gas has nowhere to go. The pressure build up, until the cork pops out ... to make your rocket more ...