Sigmund Freud based brain teaser puzzle. Part of the Great Minds collection by Professor Puzzle Can you discover how to open this clever little wooden trick box to release the pencil and the quote hidden inside? Warning: writing with this pencil may cause the odd Freudian slip! Aim: To unlock the pencil from the box & reveal the hidden quote. A great gift for any fan creative thinking brain teaser puzzles. Your aim is to Part of Professor Puzzles Great Minds a suite of 3D Puzzle / Brain Games based upon histories best minds.