The rocket you see above, Zeus III, is a simple-as-possible design built in about 20 minutes with a few things we had lying around the house. It’s an empty soda bottle, some plastic fins ...

Mr. Schellenberg designs and builds "state-of-the-art-technology" pop-bottle rockets. They're made by attaching plastic or cardboard fins to an empty bottle, punching a hole in the bottle top to ...

The rocket remained intact, but it needed more stabilization and more attention to balance. For round two the next day, we decided to put the fins way behind it, more like a bottle rocket ...

It's a pretty simple design---you can build it yourself or buy a kit. Here is a fancy homemade version of a water bottle rocket launcher (in slow motion). OK, here is one more water bottle rocket.

Rachel, Lauren and Julieta from Ms. Suarez’s class worked together to design, create and write out a plan for their bottle rocket that went up against at least 70 other teams from 35 schools.