Answer:
I carry you down a gentle stream.
Always in you, sometimes on you. If I surround you, I can kill you. What am I?
I can be winding and I can be straight. I can be smooth and I can be rough. Sometimes both. I start out black but fade to brown. My favorite colors are yellow and white and I love stripes and dashed lines.
You hear me speak, for I have a hard tongue. But I cannot breathe, for I have not a lung. What am I?
I climb higher as I get hotter. I can never escape from my crystal cage.
No matter how little or how much you use me, you change me every month.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic