Riddles for Grade 3

I follow you all the time and copy your every move, but you can't touch me or catch me. What am I?

What goes up but never comes down?

What is full of holes but still holds water?

It belongs to you, but other people use it more than you do. What is it?

What question can you never answer yes to?

What has to be broken before you can use it?

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

There's a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What color are the stairs?

How many months of the year have 28 days?

What is always in front of you but can't be seen?