Kate Miller and Katey Shirey spoke about life in Antarctic and the science of IceCube to two groups of ~30 elementary-aged kids at the National Science Foundation's Take-Your-Daughter-or-Son-to-Work Day.
Just as the increase in atmospheric CO2 is causing the global air temperture to rise, the container with the added CO2 will trap more heat inside and will show a higher internal temperature.
Overview
This activity/demonstration can be used directly following lessons on greenhouse gasses and their effects on warming the atmosphere by allowing shortwave UV energy