Okay kiddo, so polymorphism in materials science is like when you have a toy that can transform into two different things - maybe it can be a truck or a robot.
In the same way, some materials can also transform into different structures. Imagine a toy made of Lego blocks, but instead of being stuck together forever, you can take the blocks apart and put them together in a different way, making a new toy.
Polymorphism in materials happens when the atoms or molecules that make up a material can arrange themselves in different ways, creating different structures with different properties. So a material can have different forms or structures, kind of like how a toy can have different forms depending on how you put the pieces together.
These different structures can have different physical and chemical properties - like being harder, softer, more brittle, or more flexible. Scientists study polymorphism because it can affect how a material is used in different applications, like in medicine or electronics.
So, in short, polymorphism is like a toy that can transform into different things, and it is important for materials scientists to understand how it works because it affects how materials behave and how they can be used.