Best short easy riddles

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

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

You bury me when I am alive, and dig me up when I die. What am I?

What is invisible and makes people suffer from symptoms like sweating and nausea, yet people can’t survive without it?

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

What has a tongue, cannot walk, but gets around a lot?

What has many keys but can't open any doors?