This interactive workshop encourages participants to sort a variety of fasteners—screws, nails, and bolts—according to a self-chosen secret rule. Students must document their sorting method and group names, followed by a comparison with a peer’s sorting approach. It introduces the concepts of arbitrary and systematic sorting, highlighting the importance of objective criteria in scientific practices. Participants reflect on the differences in sorting methods and consider the consequences of using arbitrary versus systematic sorting techniques, especially in contexts like organizing fasteners for a space rocket. The activity culminates in an explanation exercise that emphasizes the necessity of systematic sorting in scientific endeavors.