This lab activity explores four materials, crayon, pasta, matches, and lemonade, after they have heat added to them. The students collect and analyze information about whether or not the materials change state and if the change is reversible or irreversible. The lesson materials provide detailed steps and include lab books, or a lab book template, with which to collect data. There are helpful prompts to support discussion. This is the 5th lesson in a series of 11 lessons written about properties of matter. Note: The crayons are referred to in this lesson, but the investigation is done in a previous lesson.