In this activity, learners discover that sand is the major ingredient in glass. They carry out a guided investigation involving chocolate to see what happens when heat is applied to a material that appears solid at room temperature. They learn that glass has special physical properties that allow it to be formed into many different and beautiful objects. At the end, learners can eat the outcomes of the investigation! This activity is featured on pp.32-34 of the "Fireworks of Glass: The Art of Dale Chihuly" unit of study for grades 3-5.