2. materials 2-two liter bottles Duct tape Fin material Scissors Hot Glue Launch platform Compressor Recording sheet Timer Extra bottle for repair

3. videos http://www.youtube.com/watch?v=S2dzjhzb3mA http://www.youtube.com/watch?v=xav_7AkUgGw&saf ety_mode=true&persist_safety_mode=1&safe=active http://www.youtube.com/watch?v=xav_7AkUgGw&saf ety_mode=true&persist_safety_mode=1&safe=active http://www.youtube.com/watch?v=F- nlZQfFYfA&safety_mode=true&persist_safety_mode=1 &safe=active

4. More vids http://www.youtube.com/watch?v=0qzOzjRJpaU