Grades 6-8. Engage students with an intriguing demonstration--pieces of a candle float and sink in 2 seemingly identical liquids. Students explore the density of the solids and liquids, evaluate their findings by creating a colorful column, then explain the mystery behind the demonstration. They extend their knowledge to understand what materials float and sink. Includes concepts such as buoyancy, intensive/extensive properties, and testing predictions. Instructions included. For 15 teams.