Materials Needed to build a Bottle Rocket:

2 Soda Bottles (empty)

1 knife I prefer X-acto brand for cutting foam core.

1 Large sheet of Foam. Foam Core can be found at almost any arts and crafts supply store.

5 Min Epoxy.

2 (or more) Permanent Markers - Sharpies.

Clear Shipping Tape - It's thicker than regular scotch tape and about 2" wide.

2 (or more) cans of spray paint - Pick your own favorite colors! (optional)

Source: http://www.instructables.com/id/Soda-Bottle-Water-Rocket/