When Goldilocks finds three bowls of porridge at different temperatures in the three bears’ house, she accurately assess the situation and comes up with one of the most recognizable lines in children’s literature, “This porridge is too hot; this porridge is too cold; ahh, this porridge is just right!” Goldilocks’ famous line is a perfect lead-in for an inquiry with upper elementary students that explores the concept of heat energy as measured by temperature. In the investigation, students consider the variable that might account for temperature differences between each bear’s porridge.