What month of the year has 28 days?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

Which is the correct shadow of the bird?

What is the Surname of Barbie Doll?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

What jumps when it walks and sits when it stands?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

I don't get anymore wetter, no matter how much rain falls on me.