Model rocketry

Its hard to beat rockets as an engagement piece for introducing space topics or Newton's third law. Rockets can provide excellent science fair projects for upper elementary through middle schoolers, and water/air propelled rockets are perfect for design activities. The most comprehensive resource on chemical propellant rockets is the National Associaiton of Rocketry http://www.nar.org/index.html . If you are an adult leader or teacher with plans to launch rockets for your school or group, consider joiing NAR for the benefits and insurance coverage.