Answer:
The higher I climb, the hotter I engage. I cannot escape from my crystal cage.
Large as a mountain, small as a pea, Endlessly swimming in a water-less sea.
Inside a great blue castle lives a shy young maid. She blushes in the morning and comes not out at night.
The stack just might be sent all over. Full of what's new, yet it's nearly obsolete.
As light as a feather, but you can’t hold it for ten minutes.
I am your mother's brother's only brother in law. Who am I?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?