ScienceWiz - Baking Soda Bottle Rocket Tubes with Stoppers (Pack of 2) AWARD WINNING ScienceWiz curriculum is designed to teach kids science in an intuitive and natural progression The sky is the limit with this bottle rocket tube set from the award winning science experiment creators, Science Wiz Add baking soda to the tube and place into soda bottle filled with water and a little vinegar to create a baking soda bottle rocket Each package includes two tube assemblies with stoppers Intended to be parts for use with science projects, science fairs, etc. and are provided with minimal to no operating instructions