Science has an answer for everything.

Grace is very into science. She's learning a lot at school and find it all very interesting. I know she's getting it because she is able to work her knowledge into her everyday life. For example:

Grace came home from school today and squeezed my hand. Her hands were like little icicles. (Today was the first snow of winter!)

L: Wow! You are freezing.

G: No I'm not. I'm a mammal, so I have a lot of hair on my arms.

Good to know.