Riddle: A room with no windows or doors, walks in the night, grows in a day, is found where there is death and decay. What is it?
Answer: Mushrooms.
Riddle: I am never quite what I appear to be. Straight-forward I seem, but it's only skin deep, for mystery most often lies beneath my simple speech. Sharpen your wits, open your eyes, look beyond my exteriors, read me backward, forwards, upside down. Think critically and answer the question. What am I?
Answer: I am a Riddle!
Riddle: I am black of eye and bright of hair. I fast in to the ground and follow my lord as he races around the world. What am I?
Answer: I'm a Sunflower.
Riddle: How do you spell hard water with three letters?
Answer: ICE.
Riddle: I am at the beginning of all things. I am at the end of eternity. There is but one path from my beginning to my end. My whole embodies indifference. What am I?
Answer: I am Apathy!
Riddle: Alive without breath, as cold as death; Never thirsty, ever drinking, All in mail never clinking. What is it?
Answer: Fish.
Riddle: I am a window, I am a lamp, I am clouded, I am shining, and I am colored; set in white, I fill with water and overflow. I say much, but I have no words. What am I?
Answer: I am an eye.
Riddle: I am a path situated between high natural masses. Remove my first letter and you have a path situated between man-made masses. What am I?
Answer: A Valley. 
Riddle: I always point in the right direction. My instructions are written in black and white. Disobey me and pay the consequences. I will never say more than two words at a time. What am I?
Answer: A "One Way" sign!
Riddle: They are dark and always on the run. Without the sun, there would be none. What are they?
Answer: Shadows.