A collection of four activities for science outreach events was developed to teach middle school students about the temperature dependence of scientific phenomena. Procedures are described for four interactive demonstrations on phase changes, fluorescence, viscosity effects on diffusion, and conductivity. Each hands-on activity helps students visualize the scientific concept under investigation while they use the scientific method to evaluate the effects of temperature on experiment outcomes. Activities were designed to be completed relatively quickly and at low cost, which facilitates their incorporation into science outreach events.