I’m white or colored, but have no skin. I have a body, but no organs within. I’m used to build knowledge, yet I’m slowly consumed by it. I leave a ghost of myself behind whenever I speak. What am I?

I hold a small jungle, leafy and green, a tiny ecosystem behind a glass screen.

I am born from milk yet rarely seen plain Left in the dark I grow richer in gain Some like me sharp others melt me with ease I am full of holes yet everyone sees What am I

I've been with you since you were born, I've vowed to protect you til morn', and so while you sleep I am placed at your feet and fight off the monsters with scorn.

From trees I come in milky white, then shaped by heat to gain my might. I stretch and bend but still endure, made strong and firm through fire’s cure.