In this lesson plan, adaptable for grades 3-8, students play Atom Touch, a simulation that invites learners to explore principles of thermodynamics and molecular dynamics. Specifically, they gain a hands-on understanding of how sodium and chloride atoms behave in the real world under various conditions that they get to control. They’ll also learn about the forces that atoms put on each other. This simulation invites students to explore principles of thermo- and molecular dynamics in a hands-on, playful way.