Fun Riddles and brain teasers

I am always hungry and will die if not fed, but whatever I touch will soon turn red. What am I?

What is so fragile that saying its name breaks it?

What five-letter word becomes shorter when you add two letters to it?

People make me, save me, change me, raise me. What am I?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

what has 4 wheels and flies?

What has to be broken before you can use it?

What can you break, even if you never pick it up or touch it?

I’m tall when I’m young, and I’m short when I’m old. What am I?

 A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Which is heavier: a ton of bricks or a ton of feathers?