Hi there! Let's talk about iguanas and their cool skin. Iguanas are reptiles, and their skin is covered in tiny pieces called scales. These scales can change color depending on things like how warm it is or if it's dark or bright.
When it gets warm, an iguana's scales might get darker to soak up more heat from the sun, helping it stay warm. When it's cooler or darker, their scales might look lighter to help keep their body temperature steady. This color change also helps iguanas hide from animals that might want to catch them!
So, iguanas use their changing colors to stay comfortable and safe, kind of like how you wear different clothes when it's hot or cold outside!