Decoration. Once your rocket is built, decorate it! Add glitter or a scary face, or keep it NASA-appropriate with a gleaming white paint job. The only necessary marking is a fill line for your water.

Water rockets work on the premise that if water is evacuated from one side of a container, ... Usually, this takes the form of a 2-liter bottle, a tire pump and some cardboard fins.

We think that rocket needs a few fins. Posted in News Tagged compressor, hose, PVC, ... NASA had plans for parents and teachers to build a compressed air soda bottle water rocket a few years ago.

Idaho State University's Physics Department students taught the kids a little about physics and showed them how to build ...

Water rockets are created from plastic bottles, made aerodynamic by nose cones and fins. The rocket is part filled with water, and air is pumped in with a foot pump.

As you might have guessed, fins are used on rockets in order to keep them stable while in flight. At least in the case of model rockets and military ordinance.

Water rockets are created from plastic bottles, made aerodynamic by nose cones and fins. The rocket is part filled with water, and air is pumped in with a foot pump.