For a Valentine's Day surprise, glue candy hearts to your loved one's car using royal icing.
Royal Icing is a smooth, hard-drying icing that cements edible decorations together. The recipe requires: 3 Tablespoons Wilton Meringue Powder, 4 cups confectioners' sugar and 6 Tablespoons warm water. Do NOT color! Icing will wash off with warm or hot water.