This 5E cycle of lessons takes students through a fun and thorough study of Silly Putty's properties, progressing from an initial observation of a "melting snowman" toy in the Engage phase to making and "marketing" their own homemade putty in the Evaluate phase. Along the way, students use evidence to construct their own explanations for the discrepant events presented by non-Newtonian fluids, through a careful progression from the Explore phase to the Explain phase. For this lesson, you will need one container of Silly Putty for each pair of students and a "melting snowman" toy (available at many retailers, such as Amazon). In addition, each student will need safety goggles and non-latex gloves, and the teacher will use a hammer during the Explore phase.