Maybe it's the peculiar way they walk or their cute little suits, but students of all ages are drawn to penguins. To meet younger students' curiosity, the authors adapted a middle-school level, penguin-themed curriculum unit called Save the Penguins (Schnittka, Bell, and Richards 2010) for third-grade students. The students loved learning about penguins that live all over the world and in various climates. This three-day interdisciplinary science unit allows students to explore their own ideas about penguins, temperature, and heat. The students even used engineering to design miniature dwellings to protect models of South African penguins from climate change and attacks by gulls. Specifically, the objectives of the unit are for students to (1) describe where penguins live, some features of warm and cold climate penguins, and the climate issue affecting penguin populations; (2) compare the temperatures for each given sample of material and describe which materials prevent heat transfer the best; (3) construct a small shelter for a penguin-shaped ice cube so that at least half the penguin mass remains after being placed in a thermal oven for 20 minutes; and (4) describe that heat travels more slowly through some materials than others and that light is reflected by some colors and absorbed by others to make the material hot. The authors used the 5E Learning Cycle model (BSCS 1989) to achieve these objectives because it is a proven method of teaching science. (Contains 3 figures, 2 resources and 5 online resources.)