ScienceWiz - Ceramic Ring Magnets (Pack of 3) AWARD WINNING ScienceWiz curriculum is designed to teach kids science in an intuitive and natural progression Explore the basics of magnetism with this set of ceramic ring magnets from the award winning science experiment creator, Science Wiz Each pack includes three 1" diameter ceramic ring magnets and a plastic balancing tube Learn about the concept of magnetic attraction as rings "float" along the plastic balancing tube Intended to be parts for use with science projects, science fairs, etc. and are provided with minimal to no operating instructions