The sugar will mix into clumps and then slowly melt. Once the sugar is completely melted, with a Parent Wizard's help, pour the mixture onto the chilled cookie sheet. Let glass cool. Then carefully remove the glass from the cookie sheet. Glass is made of sand, soda and lime, or to be more precise, silicon dioxide, sodium oxide and calcium oxide.
Sugar is made up of crystals just like sand.
When the sugar is heated, the sugar molecules break apart. The molecules reconnect as the sugar syrup cools forming a clear solid. Silicon dioxide, the main ingredient in sand, is one of the most abundant resources on earth. The fake glass bottles and windows that the cowboys broke in western movies were made of sugar glass. Fiber optic cable is made of glass and carries far more information than the same size wire cable.