Short simple riddles for teens

I come in many colors and I'm often in a wrap. I am a dentist's trap. Children love to eat me, but they shouldn't have too many. What am I?

I am a large cat, but I don't meow. I have a loud roar that can be heard from miles away. Who am I?

I have a headboard but no brain, and a footboard but no toes. You visit me to travel to worlds that don't exist. What am I?

I am a giant sandbox built by nature. I have a coat of gold and a hem of blue, and I am the favorite place for a holiday view. What am I?

I am known as a king, and the jungle's where I reign. It is hard to tame me, and I have a large mane. Who am I?

I am sweet and tasty, sometimes hard or chewy. I wear a bright paper coat that is noisy and crinkly. Who am I?

I have billions of tiny stones but no mountains. I have waves but no hair. People lie on me to feel the warmth of the sun. What am I?

Before Mt. Everest was discovered, what was the highest mountain in the world?

What is the ancient invention that allows people to see through walls?

When it comes to me, you go on red and stops on green. What am I?