Answer:
The warmer I am the fresher I am.
What invention lets you look right through a wall?
The warmer I am, the fresher I am. What am I?
I am drawn by everyone without pen or pencil
If you drop me, I'm sure to crack. Give me a smile and I'll always smile back. What am I?
Bury deep, Pile on stones, My mind will always Dig up them bones