It's world thinking day... so with no further ado, wrap your thinking caps round this wise Wednesday quiz.

Answer below on the comments. We'll reveal the answer later on.

#wisewednesday #quiz #trivia #think #thinking #thinkingday #worldthinkingday #bursa #whatdoesitdo #howitworks #body #anatomy

A game - what is this device?

The round knob can be pulled up about 3 cm. You can release it and it will make a satisfying clunk. This is part of its operation. There is a very fine ridge of metal just inside the bell shaped end.

When it is in use, it is held vertically.

#Game #tool #WhatDoesItDo