Water Rocketry is a thriving hobby, as evidenced by the hundreds of websites devoted to the water rocketry experience, ranging from rocket club sites to online stores offering rocket kits. You can find most of the links shown below if you simply enter the search term "water rocket" into a web search engine.
Since WPI does not endorse any water rocket products, we do not include links to online stores. However, the search terms "water rocket" and "water rocket kit" will plunge you into the online world of commercially available water rockets. Feel free to use or modify a commercial rocket in the competition.