From TrendHunter.com – Design Trends –Deceptively Simple Puzzles – The Four-Piece T-PUZZLE is Unassuming Yet Challenging (TrendHunter.com):
(TrendHunter.com) As innocent as the letter ?T? looks, most people take more than half an hour to solve this puzzle, while others go as far as to say the four-piece T-PUZZLE is unsolvable.Studies have shown…